Device of switch reluctance motor control of single electric current sensor and method of realizing
A switched reluctance motor and control device technology, applied in the direction of single motor speed/torque control, AC motor control, control system, etc., can solve the problems of difficult precise control, one-way phase current of switched reluctance motor, etc., and achieve improvement The effects of control accuracy, improved system performance, and simple device structure
Inactive Publication Date: 2008-06-18
HEBEI UNIV OF TECH
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Problems solved by technology
It belongs to the single current sensor four-phase (8 / 6 pole) switched reluctance motor controller, which solves the problem that the switched reluctance motor is difficult to accurately control due to the unidirectional and pulsating phase current, and the perforated Hall current sensor detects two-phase Realization method of current during conduction
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[0017] The present invention is described in detail as follows in conjunction with accompanying drawing:
[0018] As shown in Figure 1, the connection between the main circuit power device of the system power converter and the switched reluctance motor adopts a two-phase energization method, and the freewheeling and commutation of the circuit are realized by freewheeling diodes. The on and off of the power device is controlled by the pulse width modulation signal (PWM), and the speed regulation of the switched reluctance motor is realized. During operation, the switched reluctance motor is turned on in a cycle in the order of AB-BC-CD-DA, and each phase passes current. Since the two phases are turned on at the same time, and the characteristic of the switched reluctance motor is that the phase current flows in one direction. That is, when there is current in phase A, there is no current in phase C. On the contrary, when there is current in phase C, there is no current in phase...
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The invention relates to a four-phase (8 / 6 pole) switch magnetic resistance motor control device of a single current sensor and a realized method thereof. The invention mainly comprises a current detecting circuit, a power conversion circuit, an A / D conversion circuit, a digital signal processing (DSP) controller circuit and a switch magnetic resistance motor; the power conversion circuit is respectively connected with the current detecting circuit and the switch magnetic resistance circuit; the current detecting circuit is also connected with the A / D conversion circuit; the A / D conversion circuit is connected with the digital signal processing (DSP) controller circuit. The invention has simple structure and convenient detection, and can be applied to switch magnetic resistance motor speed regulation systems such as robots, numerical control machine tools, radar tracking, artillery following, etc. systems, including the industries such as mine, metallurgy, power, chemical engineering, petroleum, etc., which can effectively improve the performance of the system and enhances control precision.
Description
technical field [0001] The invention relates to a phase current detection method and control of a switched reluctance motor (Switched Reluctance Motor, referred to as SRM) when two phases are turned on, in particular to a four-phase (8 / 6 pole) switched reluctance motor control device with a single current sensor and its implementation method. Background technique [0002] As we all know, one-way, pulsation, and waveforms vary greatly with different operating modes and operating conditions, which are the basic characteristics of the phase current of switched reluctance motors. The control of the phase current in the winding is the core content of the entire switched reluctance motor (SRM) speed control system. The quality of the current control directly affects the speed control performance of the system. If the current ripple is too large, the torque ripple may increase, and the motor Noise will also increase. Although the traditional current hysteresis control can quickly...
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Login to View More IPC IPC(8): H02P6/16H02P6/08H02P27/04H02P27/08
Inventor 孙鹤旭郑易董砚雷兆明张炜刘汉奎
Owner HEBEI UNIV OF TECH