be delivered to a moving part, but it complicates the electrical design as
some sort of switching system needs to be used to deliver power to the different windings. With modern electronic devices, precisely timed switching is not a problem, and the SRM (Switched Reluctance Motor) is a popular design for modern stepper motors. Its main drawback is torque ripple. The SRM has the stator windings. The rotor however has no magnets or coils attached. It is a salient-pole rotor made of soft magnetic
第12章 开关磁阻电机
河南理工大学
12.1 概述
开关磁阻电机驱动系统： Switched Reluctance Drive, SRD
——开关磁阻电机（Switched Reluctance Motor, SRM ）
也称为变磁阻电机（Variable Reluctance Motor, VRM ） ——微控制器（ Micro Control Unit, MCU ）
第12章 开关磁阻电机
河南理工大学
开关磁阻电动机
（Switched Reluctance Drive ：SRD）
控制电机
Control Electrical Machine
第12章 开关阻电机
开关磁阻电机的本体结构：
河南理工大学
开关磁阻电机定子和转子均采用凸 极结构。定子和转子铁芯均用硅钢 片冲成一定形状的齿槽，然后叠压 而成。定子采用集中绕组。转子上 既无绕组也无永磁体。
align the rotor pole with the nearest stator pole. In order to maintain rotation, an electronic control system switches on the windings of stator poles in sequence, so that the magnetic field of the stator "leads" the rotor pole, pulling it forward. Rather than using a troublesome highmaintenance mechanical commutator to switch the winding current as in traditional motors, the switched-reluctance motor uses an electronic position sensor to determine the angle of the rotor shaft and control electronics to switch the stator windings, which also offers the opportunity for dynamic control of pulse timing and shaping. This differs from the induction motor which also has windings that are energised in a rotating phased sequence. an induction motor has slip, and rotates at slightly less than synchronous speed. This absence of slip makes it possible to know the rotor position exactly, and the motor can be stepped arbitrarily slowly. 控制电机 Control Electrical Machine
控制电机
Control Electrical Machine
Introduction
The switched reluctance motor (SRM) is a type of a stepper motor, an electric motor that runs by reluctance torque. Unlike common DC motor types, power is delivered to windings in the stator (case) rather than the rotor. This greatly simplifies mechanical design as power does not have to
——电力电子电路（ Power Electronic Circuits, PEC ） ——检测电路（ Detection circuit ）
开关磁阻电机的优点：结构简单坚固，起动和低速时转矩大、电流
小，调速范围宽，调速性能优异，且在整个调速范围内都具有较高效率， 系统可靠性高。有很好的容错能力。
应用：开关磁阻电机的应用和发展取得了明显的进步，已成功地应用
material (often laminated-steel). When power is applied to the stator
windings, the rotor's magnetic reluctance creates a force that attempts to 控制电机 Control Electrical Machine