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：
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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