Freescale 的电机解决方案

Freescale 的电机解决方案

关键字：同步电机,无刷直流电机, MC33937A

Keyword: Synchronous Motor ,BLDC , MC33937A

摘要： 可以使用塔式系统设计TWR-MC-LV3PH的的低电压3相电机控制模块实现三相无刷直流（BLDC）和永磁同步电机（PMSM）电机控制功能。并且此外设模块，能够提供有效的塔式系统开发工具，一个完整的电机控制参考设计工具包，包括一个BLDC电机。

基本特性：

The 33937A is a Field Effect Transistor (FET) pre-drivers designed for three phase motor control and similar applications. The integrated circuit (IC) uses SMARTMOS? technology.

The IC contains three High Side FET pre-drivers and three Low Side FET pre-drivers.Three external bootstrap capacitors provide gate charge to the High Side FETs.

The IC interfaces to a MCU via six direct input control signals, an SPI port for device setup and asynchronous reset, enable and interrupt signals. Both 5.0 and 3.0 V logic level inputs are accepted and 5.0 V logic level outputs are provided.

方案介绍：

The 3-phase Low Voltage Motor Control board (TWR-MCLV3PH) is a peripheral Tower System Module. With one of the available MCU tower modules accommodating a selected microcontroller it provides a ready-made, softwaredevelopment platform for one-third horsepower off-line motors. Feedback signals are provided that allow a variety of algorithms to control 3-phase PMSM and BLDC motors.

The TWR-MC-LV3PH module features:

? Power supply voltage input 12-24 VDC, extended up to 50 V (see Electrical Characteristics for details)

? Output current up to 8 amperes (A)

? Power supply reverse polarity protection circuitry ? 3-phase bridge inverter (6-MOSFET’s)

? 3-phase MOSFET gate driver with over current and under voltage protection

? 3-phase and DC bus-current-sensing shunts ? DC bus-voltage sensing

? 3-phase back-EMF voltage sensing circuitry ? Low-voltage on-board power supplies ? Encoder/Hall sensor sensing circuitry ? Motor power and signal connectors

? User LED, power-on LED, and 6 PWM LED diodes

参考原理图：

原理图1

原理图2

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AO-Electronics 傲壹电子 官网：www.aoelectronics.com 中文网：www.aoelectronics.cn

原理图4

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