stm3210b-mckit and str750-mckit 3-phase motor ......table 1. motor control evaluation board...

December 2007 Rev 2 1/21

UM0379User manual

STM3210B-MCKIT and STR750-MCKIT 3-phase motor control power stage

IntroductionThis manual describes the MB459B motor control evaluation board. The MB459B is an AC/AC power converter that generates a three-phase waveform for driving three-phase motors such as induction motors or PMSM motors.

It includes:

● An input power stage with voltage rectification and auxiliary power supply,

● A 7A three-phase inverter based on IGBT and level shifter,

● A motor connector for linking with the control board,

● A connector for motors with Hall/encoder and tachometer input.

The MB459B motor control evaluation board can be supplied in two ways:

● From a single power supply for motors requiring a voltage greater than 18 V;

● From a dual power supply for motors requiring a voltage less than 18 V.

This manual describes where the various components are located on the motor control board, and the appropriate settings for driving a PMSM motor or an AC induction motor.

The MB459B board is delivered with the STM3210B-MCKIT and STR750-MCKIT motor control kits. For more information on these kits, refer to www.st.com.

www.st.com

http://www.st.com

Contents UM0379

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Contents

1 Hardware layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Operational amplifier configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.1 Three-shunt current reading configuration . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.2 Single-shunt current reading configuration . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.3 Jumper configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5 Hardware settings for driving PMSM motors . . . . . . . . . . . . . . . . . . . . 11

6 Hardware settings for driving AC induction motors . . . . . . . . . . . . . . 12

7 Description of jumper and connector settings . . . . . . . . . . . . . . . . . . . 13

8 Schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

UM0379 Hardware layout

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1 Hardware layout

This section illustrates the main connectors of the MB459B motor control board (see Figure 1), and describes their function.

Figure 1. MB459B connectors

1. Motor and board input power stage, auxiliary power supply, and voltage rectification

2. Prototype area

3. J3 connector: power supply input

4. J1 connector: auxiliary supply input

5. J8 connector: Hall sensors / encoder input

6. J6 connector: tachometer input for closed-loop controlled AC motors

7. J5 connector: Three-phase output to motor

8. J7 motor connector: link to STR75x and to STM3210B-EVAL evaluation board, or other control board

9. 7A inverter and level shifter

6

1

2

3

4

5

7

9

8

6

1

2

3

4

5

7

9

8

Power supply UM0379

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2 Power supply

The MB459B motor control evaluation board can be supplied from a single power supply or from a dual power supply.

● Single power supply for motors requiring a voltage greater than 18 V

The power is supplied to the J3 connector. The voltage must not exceed 42V DC or 30Veff AC. It supplies both the motor and the motor control board. A 15V DC voltage is automatically generated for the motor control board logic. However, depending on the voltage supplied, two cases are possible:

– If the supplied voltage is greater than 35V DC, the W1 jumper must be set in "HIGH VOLTAGE" position;

– If the supplied voltage is between 18V and 35V DC, the W1 jumper must be set in the "

UM0379 Operational amplifier configuration

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3 Operational amplifier configuration

The MB459B motor control evaluation board can be configured to run in two current reading configuration modes:

● Three-shunt configuration

● Single-shunt configuration

Single-shunt configuration requires a single op-amp, three-shunt configuration requires three op-amps, and for compatibility purposes, one of them must be common to the two configurations.

Jumpers W7, W8 and W9 allow you to set the common op-amp to achieve the compatibility between single-shunt and three-shunt current reading mode.

The TSV994 used on the motor control board has a 20MHz gain bandwidth and operates with a single positive supply.

3.1 Three-shunt current reading configurationFigure 3 gives the op-amp configuration for the three-shunt current reading mode. In this configuration, the alternating signal on the shunt resistor, with positive and negative values, must be translated to be compatible with the single positive input voltage of the microcontroller’s analog-to-digital converter used to read the current value.

This means that the op-amp must be polarized in order to obtain on the output a voltage that makes it possible to measure the symmetrical alternating input signal.

Figure 3. Three-shunt configuration

vs

+5V

U

e+

-

3

26

74

r2

r3

r

R

r1

shunt

i1

i2

Operational amplifier configuration UM0379

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The op-amp is used in follower mode with a gain set by resistors r and R.

G = s / v = (R + r)/r

The relation between the input signal e and the signal v on the positive input of the follower is:

v = (U/(k*r3) + e/(k*r1))

where k =(1/r1+1/r2+1/r3)

The resistor values implemented on the MB549B board are:

R=5400Ω \ r=1000Ω \ r1=660Ω \ r2=560Ω \ r3=4700Ω

and

U=5V

Therefore, the gain is:

G = 6.4

The response of the op-amp is represented in Figure 4.

Figure 4. Voltage response in three-shunt configuration

With these settings, the output voltage of the op-amp is equal to 1.94V for a nil current.

The peak current that can be measured in this configuration is:

+/- 5A for R_shunt = 0.1ohms

+/- 2.3A for R_shunt = 0.22 ohms

Op_Amp Output

0.0000.5001.0001.5002.0002.5003.0003.500

-0.6 -0.4 -0.2 0 0.2 0.4 0.6

V shunt

Vou

t Op_

Amp

Series2


7/21

3.2 Single-shunt current reading configurationIn the single-shunt current reading configuration, the current sampling is done only when the value on the shunt resistor is positive.

The only positive value read on the shunt resistor allows to set a higher gain for the op-amp than the one set in three-shunt mode. However, because the input of the op-amp is not rail-to-rail, in this configuration also, it is necessary to polarize the it to compensate for this limitation.

Figure 5 shows the op-amp configuration used in single-shunt configuration.

Figure 5. Single-shunt configuration

The op-amp is used in follower mode with a gain set by resistors r and R.

G = s/v = (R + r)/r

The relation between the input signal e and the signal v on the positive input of the follower is:

v = ((U*h)/(k*r4) + f(e))

with:

k =(1/r3+1/(r1+r2)+1/r4)

h=r1/ (r1 +r2)

f(e)=(e*r2)/ (r1 + r2) + (e*r1)/((k*(r1+r2)*(r1+r2))

The resistor values implemented on the MB549B board are:

R=11000Ω \ r=1000Ω \ r1=1130Ω \ r2=1000Ω \ r3=22Ω \ r4=2200Ω

and

U=5V

Therefore, the gain is:

G = 12

vs

w

+5V

U

er1

r

r2

R

r3

shunt

+

-

3

26

74

r4

i1

i2

Operational amplifier configuration UM0379

8/21

The response of the op-amp is shown in Figure 6.

Figure 6. Voltage response in single-shunt configuration

In this configuration, the output voltage of the op-amp is equal to 3.16V when the maximum peak current that is measured in R_shunt is reached:

+ 5A for R_shunt = 0.1Ω or + 2.3A for R_shunt = 0.22Ω

Op_Amp Output

0.0000.5001.0001.5002.0002.5003.0003.500

0 0.1 0.2 0.3 0.4 0.5 0.6

V shunt

Vout

Op_

Amp

Series1


9/21

3.3 Jumper configurationBased on the two current reading configurations for single-shunt and three-shunt, the final configuration of the common op-amp is summarized in Figure 7.

Figure 7. Common op-amp configuration

s

3_Shunts

1_Shunt

+5V

U

e+

-

3

26

74

W9

W8

W7

shunt

Electrical specifications UM0379

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4 Electrical specifications

Table 1 provides the maximum ratings for the MB459B motor control board.

The maximum current allowed on the motor phases is mainly dependent on the shunt resistor value and op-amp gain. For further information, see Section 3: Operational amplifier configuration on page 5.

Table 1. Motor control evaluation board electrical specifications

Parameter Maximum ratings

Motor types Three-phase PMSM or AC motor

Main input voltage (J3) 42V DC or 30 Veff AC

Auxiliary input voltage (J1) 15V DC, 0.5A

Maximum output current on motor phases (J5) 7A

UM0379 Hardware settings for driving PMSM motors

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5 Hardware settings for driving PMSM motors

To drive the PMSM motor, you must simply ensure that the MB459B motor control board is driven by a control board that outputs the six signals required to drive the three-phase power stage. The MB469B STR75x evaluation board provided in the STR750-MCKIT or the STM3210B-EVAL evaluation board provided with the STM3210B-MCKIT are perfectly suited for this task.

To drive any other generic high voltage PMSM motor, you must ensure that:

● your PMSM motor is connected on the motor control board in place of the PMSM motor provided, on the J5 and J8 connectors,

● the motor phases are connected to the board on the J5 connector,

● the encoder from the PMSM motor is connected to the board on the J8 connector

For example, for the Shinano PMSM motor provided with the STR750-MCKIT and the STM3210B-MCKIT the connections are listed in Table 2.

Table 2. Jumper settings for a PMSM motor (default settings)

JumperSettings for the supplied

SHINANO 24V PMSM motorSettings for a generic high

voltage PMSM motor

W1 “< 35V Only” “< 35V Only” or “ HIGH VOLTAGE”

W4 Present

W5 Not present

W6 Present

W7 Present and set to default position of silk-screen printing

W8 Present

W9 Present

W10 Present

W11 Present

W12 Not present

W13 Not present

W14 Not present

W15 Not present

W16 Present and set to reverse position of silk-screen printing

W17 Present

W18 Present

W19 Present

Hardware settings for driving AC induction motors UM0379

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6 Hardware settings for driving AC induction motors

To drive an AC induction motor, you must ensure that:

● The motor control evaluation board is driven by an adapted control board that outputs the six signals required to drive the three-phase power stage,

● The AC induction motor is connected on the motor control board in place of the PMSM motor,

● The AC induction motor phases are connected to the board on the J5 connector,

● The tacho generator is connected to the board on the J6 connector.

Table 3. Jumper settings for an AC Induction motor

Jumper Settings for a generic AC motor with tachometer feedback

W1 “< 35V Only” or “ HIGH VOLTAGE”

W4 Present

W5 Not present

W6 Present

W7 Present and set to default position of silk-screen printing

W8 Present

W9 Present

W10 Present

W11 Present

W12 Present

W13 Not present

W14 Not present

W15 Not present

W16 Present - any position

W17 Not present

W18 Not present

W19 Not present

UM0379 Description of jumper and connector settings

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7 Description of jumper and connector settings

Table 4. Jumper descriptions

Jumper Selection Description

W1

“ HIGH VOLTAGE” Motor supply is greater than 35V DC or 25Veff AC.

“< 35V Only” Motor supply is less than 35V DC or 25Veff AC.

Not present

Power motor supply is separate from motor control circuit.The motor control circuit must be supplied with 15V DC (0.5A) on J1 connector. In this case, the D3 short-circuit must be removed (unsoldered) from the PCB. Refer to Section 2: Power supply for details.

W4

PresentConnects R3 shunt resistor to T2 IGBT source for the three shunt configuration.

Not presentDisconnects R3 from T2 IGBT source for the single shunt configuration.

W5

PresentConnects the T2 IGBT source to R4 shunt resistor for the single shunt configuration.

Not presentDisconnects the T2 IGBT source from R4 shunt resistor for the three shunt configuration.

W6

Present

Connects the output of thermal comparator on shut-down to the pin 2 input of the L6386 MOS-driver. In such cases, the thermal protection can also generate an emergency stop forcing the Fault signal to low.

Not presentDisables feedback of thermal comparator on L6386 MOS-driver.

W7

Set to default position of silk-screen printing

Selects the input polarization of Phase B current op-amp for the three shunt configuration.

Set to reverse position of silk-screen printing

Selects the input polarization of Phase B current op-amp for the single shunt configuration.

W8

PresentSets the input resistor of Phase B current op-amp for three shunt configuration.

Not presentSets the input resistor of Phase B current op-amp for single shunt configuration.

W9

PresentSets the gain resistor of Phase B current op-amp for three shunt configuration.

Not presentSets the gain resistor of Phase B current op-amp for single shunt configuration.

W10


Connects R5 shunt resistor to T6 IGBT source for the three shunt configuration.


Connects the T6 IGBT source to R4 shunt resistor for the single shunt configuration.

Description of jumper and connector settings UM0379

14/21

W11

PresentConnects the output of diagnostic comparator to the Fault/MC EMGCY input of microcontroller pin P1.10

Not presentDisconnects the output of diagnostic comparator from the Fault/MC EMGCY input of microcontroller pin P1.10

W12

PresentConnects the tachometer signal to Measure Phase A / TIM2_TI1 input P0.03. In that case, W17 is not present (removed).

Not presentDisconnects the tachometer signal from Measure Phase A / TIM2_TI1 input P0.03.

W13Present

The 3.3V Pow supply connected to Vdd_m is used to supply the microcontroller board connected on pin 26 of the motor control connector J7.

Not present Vdd_m is not connected to the 3.3V Pow of power board.

W14Present

The 5V supply connected to Vdd_m, is used to supply the microcontroller board connected on pin 26 of the motor control connector J7.

Not present Vdd_m is not connected to the 5V of the power board.

W15

PresentUses the 5V of the microcontroller board to supply the power board via the motor control connector J7.

Not presentThe 5V of the power board is not supplied by the microcontroller board.

W16


The +Vdd_m is used to supply the Hall sensor or encoder


The +5V is used to supply the Hall sensor or encoder

W17

PresentEnables Hall1/A+ on Measure Phase A/ TIM2_TI1 input P0.03

Not presentDisables Hall1/A+ for Measure Phase A/ TIM2_TI1 input P0.03

W18

PresentEnables Hall2/B+ on Measure Phase B/ TIM2_TI2 input P1.03

Not presentDisables Hall2/B+ for Measure Phase B/ TIM2_TI2 input P1.03

W19

PresentEnables Hall3/Z+ on Measure Phase C/ TIM0_TI1 input P0.01

Not presentDisables Hall3/Z+ for Measure Phase C/ TIM0_TI1 input P0.01

Table 4. Jumper descriptions (continued)

Jumper Selection Description

UM0379 Description of jumper and connector settings

15/21

Table 5. Connector pinout descriptions

Name Reference Description/pinout

J1

Optional 15V DC, 0.5A input connector to supply the motor control board logic separately from the motor power stage.

1) 15V DC power supply2) Vss power

J2

15V DC output connector to supply auxiliary board. This connector is not mounted.

1) 15 V DC power supply2) VSS power

J3

Up to 42V DC or 30Veff AC power supply input connector.

1) Earth/ground2) Power input (AC/DC)3) Power input (AC/DC)

J4

BEMF daughter board connector1) Phase A2) Not connected3) Phase B4) Not connected5) Phase C6) Not connected7) Bus voltage8) Not connected9) +5V10) +Vdd_m11) Vss board12) PWM Vref

J5

Motor three-phase output.

1) Motor phase C2) Motor phase A3) Motor phase B4) DC bus middle point (may be used for two-phase motors)5) Earth

J6Tachometer input connector for AC motor speed loop control.

1) Tachometer bias (0.6 V)2) Tachometer input

1 2

1 2

1

2

3

12

1

5

1

2 1

Description of jumper and connector settings UM0379

16/21

J7

Motor control connector1) EMERGENCY STOP ---------------- 2) GND3) PWM-1H ---------------------------------- 4) GND5) PWM-1L ---------------------------------- 6) GND7) PWM-2H ---------------------------------- 8) GND9) PWM-2L --------------------------------- 10) GND11) PWM-3H ------------------------------- 12) GND13) PWM-3L ------------------------------ 14) HV BUS VOLTAGE15) Current PHASE A ---------------- 16) GND17) Current PHASE B----------------- 18) GND19) Current PHASE C----------------- 20) GND21) NTC BYPASS RELAY ---------- 22) GND23) DISSIPATIVE BRAKE PWM - 24) GND25) +V Power ---------------------------- 26) Heatsink temperature27) PFC Sync --------------------------- 28) Vdd_m29) PWM Vref --------------------------- 30) GND31) Measure Phase A ---------------- 32) GND33) Measure Phase B ---------------- 34) Measure Phase C

J8

Hall sensors/ encoder input connector

1) Hall sensor input 1 / encoder A+2) Hall sensor input 2 / encoder B+3) Hall sensor input 3 / encoder Z+4) 5V DC power supply5) VSS board

Table 5. Connector pinout descriptions (continued)

Name Reference Description/pinout

331 2

34331 2

34

5 1

UM0379 Schematic diagrams

17/21

8 Schematic diagrams

The MB459B motor control evaluation board schematics are split into two sheets:

● Sheet 1/2 Current Measurement (Figure 8), shows the op-amp wiring and configuration, the encoder/ Hall sensor adaptation, the tacho input stage and the motor control connector wiring.

● Sheet 2/2 Power Switch (Figure 9), shows the power converter with its associated level shifter and all auxiliary power supplies.

The version of the board described in this manual is MB459-B01. The board version information can be found on a sticker on the component side of the PCB (the visible one), on the bottom left edge of the board when reading the serigraphy.

The changes on this version of the board compared with the previous version MB459-B00 are summarized below:

● Operational amplifiers have changed, TSV994 replacing TSH24.

● The value of capacitors C37, C42, and C47 has increased from 10pF to 100pF.

● The value of resistors R13, R23 and R52 has decreased from 2.2kΩ to 1.8kΩ.● The D3 diode is now short-circuited.

● The board can also be driven by the STM3210B-EVAL board.

Schematic diagrams UM0379

18/21

Figure 8. Schematics sheet 1/2: current measurement

PW

M_3

HB

uf

PW

M_1

LBuf

PW

M_2

LBuf

PW

M_3

LBuf

PW

M_1

HB

uf

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R43

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C59

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C51

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007

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W19

12

UM0379 Schematic diagrams

19/21

Figure 9. Schematics sheet 2/2: power switch

HV

Bus

+15V

PW

M_1

LBuf

+15V

PW

M_1

HB

uf

Faul

t

+5V

PW

M_2

LBuf

+15V

PW

M_2

HB

uf

PW

M_3

HB

uf

+15V

PW

M_3

LBuf

Pha

se C

+5V

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A

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se A

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B

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Revision history UM0379

20/21

9 Revision history

Table 6. Document revision history

Date Revision Changes

7-Feb-2007 1 Initial release.

17-Dec-2007 2Added list of changes to the MB459B board compared with the previous version in Section 8: Schematic diagrams.

Update for release of STM32B-MCKIT motor control kit.

UM0379

21/21

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1 Hardware layoutFigure 1. MB459B connectors

2 Power supplyFigure 2. MB459B power supply connectors

3 Operational amplifier configuration3.1 Three-shunt current reading configurationFigure 3. Three-shunt configurationFigure 4. Voltage response in three-shunt configuration

3.2 Single-shunt current reading configurationFigure 5. Single-shunt configurationFigure 6. Voltage response in single-shunt configuration

3.3 Jumper configurationFigure 7. Common op-amp configuration

4 Electrical specificationsTable 1. Motor control evaluation board electrical specifications

5 Hardware settings for driving PMSM motorsTable 2. Jumper settings for a PMSM motor (default settings)

6 Hardware settings for driving AC induction motorsTable 3. Jumper settings for an AC Induction motor

7 Description of jumper and connector settingsTable 4. Jumper descriptionsTable 5. Connector pinout descriptions

8 Schematic diagramsFigure 8. Schematics sheet 1/2: current measurementFigure 9. Schematics sheet 2/2: power switch

9 Revision historyTable 6. Document revision history

stm3210b-mckit and str750-mckit 3-phase motor ......table 1. motor control evaluation board...

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