Nuvoton Nu-LVMDM-MOS User manual

Nu-LVMDM-MOS V2.2 User Manual

Sept. 24, 2013 1 of 32 Rev. 1.01

Nuvoton

Nu-LVMDM-MOS V2.2

User Manual

The information described in this document is the exclusive intellectual property of

Nuvoton Technology Corporation and shall not be reproduced without permission from Nuvoton.

Nuvoton is providing this document only for reference purposes of NuMicro

™

microcontroller based system

design. Nuvoton assumes no responsibility for errors or omissions.

All data and specifications are subject to change without notice.

For additional information or questions, please contact: Nuvoton Technology Corporation.

Nu-LVMDM-MOS V2.2 User Manual

Sept. 24, 2013 2 of 32 Rev. 1.01

Table of Contents

OVERVIEW .......................................................................................................................... - 3 -

1.1

EATURES

................................................................................................................................. -

INTRODUCTION TO NU-LVMDM-MOS .............................................................................. - 5 -

2.1

-LVMDM-MOS

UMPER

..................................................................................................... -

2.2

SSIGNMENT FOR

XTENDED

ONNECTORS

.................................................................... -

2.2.1

Plug-In Module (PIM) Configuration .............................................................................. - 8 -

2.2.2

Input Power Connectors (J4, P4-P5) .......................................................................... - 10 -

2.2.3

UART Interface (CN1) ................................................................................................... - 10 -

2.2.4

Nu-Link Connector (CON1) .......................................................................................... - 11 -

2.2.5

Dedicated Oriental Motor Connector (CN4) ............................................................... - 11 -

2.2.6

Hall Sensor Connector (CN3) ...................................................................................... - 11 -

2.2.7

QEI Connector (CN2) .................................................................................................... - 12 -

2.2.8

Push-Buttons, LEDs, DIP/Toggle-Switch and VR ..................................................... - 13 -

2.3

-LVMDM-MOS

PCB

LACEMENT

................................................................................... -

RUNNING A BLDC MOTOR USING A SENSORLESS ALGORITHM ............................. - 16 -

3.1

PERATING

EQUIREMENTS

.................................................................................................. -

3.2

-LVMDM-MOS

EVELOPMENT

OARD

ETUP

............................................................... -

3.2.1

Setting the Nu-LVMDM-MOS Development Board ................................................... - 17 -

NU-LVMDM-MOS SCHEMATICS AND LAYOUT PLACEMENT ...................................... - 19 -

REVISION HISTORY ......................................................................................................... - 32 -

Nu-LVMDM-MOS V2.2 User Manual

Sept. 24, 2013 3 of 32 Rev. 1.01

1 Overview

The Nuvoton Low Voltage Motor Development Module using MOSFET power

stage (Nu-LVMDM-MOS) is used to accelerate product development by providing

ready-to-run hardware and a comprehensive Motor Development Adapter

(Nu-MDA-xxx).

The power supply can be connected to the power connector terminal (J4) or the

Auxiliary Power Tab Fast-On Connector terminals (P4-P5).

The components on the board that receive power are described as follows:

Gate drivers receive +15V power from a +15V regulator

OP Amplifiers receive +8V power from a +8V regulator

MCU motor control device receives +5V power from a +5V regulator

LCD Display receives +3.3V power from a +3.3V regulator

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1.1 Features

The key features of this board include the following:

Motor Control Interfaces

- Three-phase inverter bridge with a power rating of 36V/20A

- Hall sensors interface for sensored motor control (CN3)

- Quadrature encoder interface for sensored motor control (CN2)

- Phase voltage feedback for sensorless BLDC operation

- DC bus voltage sense for over-voltage control

- Phase current sense resistor for one / three shunt vector control

- Over-current protection

- Support for MT530 series MCUs with internal or external op amps and

comparators

Input/Output Control Switches

- Two push-buttons (K1 and K2)

- Two LED indicators for debugging purposes (LED1 and LED2)

- Reset push-button (K3)

- 50 KΩVR (VR2)

- LED indicator for Power on status (LED3)

- LCD display for debugging purposes (LCD1)

- DIP switch for configuration purposes (SW2)

- Toggle switch for motor start (SW1)

Communication Ports

- UART communication (CN1)

Power Supply Connectors

- Auxiliary Power Tab Fast-On connectors (P4 and P5) for the controller and

power stage

- Dedicated power connector (J4) for the controller and power stage

Programming Connectors

- Nu-Link connector for programming a Nuvoton MCU (CON1)

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2 Introduction to Nu-LVMDM-MOS

The Nu-LVMDM-MOS is targeted to control a brushless DC (BLDC) motor or

permanent magnet synchronous motor (PMSM) in sensor or sensorless operation.

This flexible and cost-effective module can be configured in different ways for use

with Nuvoton’s specialized motor control Microcontrollers (MCUs).

The Nu-LVMDM-MOS supports the Mini51, M051, and MT530 motor control

device families. It offers a mounting option to connect a generic 80-pin Plug-In

Module (PIM). The Nu-LVMDM-MOS also has a three-phase inverter bridge

circuit. The circuit drives a BLDC or PMSM motor using different control

techniques without requiring any additional hardware.

The board includes various circuitries to perform the following functions:

Drive a three-phase inverter that powers the motor phase windings

Measure feedback signals (e.g. voltage and phase currents) and provide a

suitable fault signal

Interface with Hall sensor or quadrature encoder for sensor-based

commutation

Communicate with a host computer or an external device via USB interface

Support motors with terminal voltage up to 36V and current up to 20A.

Note: If the output power exceeds 100W, the power MOSFETs (Q1-Q6) may

need a larger heat sink.

Nu-LVMDM-MOS V2.2 User Manual

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2.1 Nu-LVMDM-MOS Jumper

The Nu-LVMDM-MOS Development Board has five jumpers that configure the

functionality of the board. The following figure shows the jumper locations and the

following tables list the jumpers and their functions.

Figure 2-1 Jumper Setting

No. Designator Function

1 JP1 Comparator- for Over Current

2 JP2 Comparator+ for Over Current

3 JP3 U Phase current feedback

4 JP4 V Phase current feedback

5 JP5 Sum (U+V+W) current feedback

Table 2-1 Jumper Functions

Nu-LVMDM-MOS V2.2 User Manual

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No.

Designator

Position

Description

JP1 1 - 2 I_Sum signal into MCU’s internal comparator-

2 - 3 I_Sum signal into external comparator-

JP2 1 - 2 V_BIAS into MCU’s internal comparator+

2 - 3 V_BIAS into external comparator+

JP3 1 - 2 U Phase current feedback into MCU’s internal OPA

2 - 3 U Phase current feedback into external OPA

JP4 1 - 2 V Phase current feedback into MCU’s internal OPA

2 - 3 V Phase current feedback into external OPA

JP5 1 - 2 I_Sum from RL1 current sensing resistor

2 - 3 I_Sum from 3 shunt current sensing resistor

Table 2-2 Jumper Description

Note:

I_Sum: Sum current after amplified (refer to the Nu-LVMDM-MOS Schematics

and Layout PLACEMENT section).

VR1: V_BIAS adjustment for over-current threshold.

is used as the symbol for pin 1.

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2.2 Pin Assignment for Extended Connectors

2.2.1 Plug-In Module (PIM) Configuration

The following table summarizes the PIM (Nu-MDA-xxx) pin-out for the

Nu-LVMDM-MOS Development Board.

PIM Pin #

Signal Name

Pin-out Description

1 GND Ground

2 Speed Speed signal

3 DIP4 DIP4

4 GND Ground

5 DIP3 DIP3

6 SCL N/A

7 DIP2 DIP2

8 SDA N/A

9 DIP1 DIP1

10 N/A N/A

11 KEY4 N/A

12 DAC_CS DAC Chip Select

13 KEY3 N/A

14 DAC_SDO DAC Serial Data

15 GND Ground

16 DAC_SCK DAC_Serial Clock

17 KEY2 KEY2

18 TXD UART Transmit

19 KEY1 KEY1

20 RXD UART Receive

21 RUN Motor start or stop

22 N/A N/A

23 GND Ground

24 GND Ground

25 5V 5V input for MCU

26 5V 5V input for MCU

Nu-LVMDM-MOS V2.2 User Manual

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27 N/A N/A

28 DISP_SDO LCD Display_Serial Data Out

29 LED1 LED1

30 DISP_SCK LCD Display_Serial Clock

31 LED2 LED2

32 DISP_RS LCD Display_Select Register

33 N/A N/A

34 DISP_RST LCD Display_Reset

35 ICE_DAT ICE_Data

36 N/A N/A

37 ICE_CLK ICE_Clock

38 N/A N/A

39 ICE_RST ICE_Reset

40 N/A N/A

41 I_W Amplified W phase current

42 GND Ground

43 I_Sum Amplified sum current

44 Volt_U Voltage feedback signal for U phase

45 /BR N/A

46 Volt_V Voltage feedback signal for V phase

47 DCV DC bus voltage (downscaled)

48 Volt_W Voltage feedback signal for W phase

49 V_BIAS Sum current threshold

50 GND Ground

51 I_Sum_NA Non-Amplified sum current

52 Hall_U Hall sensor signal for U phase

53 /OC Over Current signal

54 Hall_V Hall sensor signal for V phase

55 I_U Amplified U phase current

56 Hall_W Hall sensor signal for W phase

57 I_V Amplified V phase current

58 QEI-Z QEI input

59 Iv- N/A

Nu-LVMDM-MOS V2.2 User Manual

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60 QEI-B QEI input

61 Iv+ V phase current feedback into MCU internal OP2+

62 QEI-A QEI input

63 Iu- N/A

64 BR_DRV N/A

65 Iu+ U phase current feedback into MCU internal OP1+

66 AC_Phase N/A

67 UL PWM Output UL

68 AC_SumI N/A

69 VL PWM Output VL

70 PFC_DCV N/A

71 WL PWM Output WL

72 PFC_CTL N/A

73 N/A IPM_Fault Output

74 Relay_SW N/A

75 UH PWM Output UH

76 GND Ground

77 VH PWM Output VH

78 PFC_FO N/A

79 WH PWM Output WH

80 FBI_P N/A

Table 2-3 Nu-LVMDM-MOS Development Board PIM Pin-out Functionality

2.2.2 Input Power Connectors (J4, P4-P5)

The Nu-LVMDM-MOS Development Board receives the power for controlling

circuits and the DC bus from a +24V power supply (connected to the board

through J4 or P4-P5).

2.2.3 UART Interface (CN1)

The board uses an external PL-2303 interface as a bridge between the UART and

USB.

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