Method, device and system for braking a switched reluctance motor
A technology of switched reluctance motor and braking mode, applied in the direction of stopping devices, etc., can solve the problems of large bleed resistor, potential safety hazard, large bleed resistor resistance, etc., to reduce hardware costs, safely eliminate, save The effect of taking up space
Active Publication Date: 2021-08-24
KINGCLEAN ELECTRIC
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Problems solved by technology
[0003] In the case of rapid braking of the switched reluctance motor (such as forward and reverse switching, shutdown), the energy fed back by the brake will cause a sharp increase in the DC bus voltage, and corresponding measures must be taken to ensure voltage safety. The brake feedback energy is released by connecting the bleeder resistor in parallel with the DC bus. However, the bleeder resistor has a large resistance value, and the heat generated when the energy is released is relatively large, which poses a certain safety hazard; at the same time, the bleeder resistor The volume of the discharge resistor is large, which increases the occupied space of the switched reluctance motor
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[0032] The core of the present application is to provide a method, device and system for braking a switched reluctance motor, which can eliminate potential safety hazards while ensuring the safety of the DC bus voltage.
[0033] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0034] Please refer to figure 1 , figure 1 It is a flow chart of a method for braking a switched reluctance motor provided in an ...
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This application discloses a method for braking a switched reluctance motor, which includes: setting the control mode as the braking mode to control the switching on and off of the winding of the switched reluctance motor; detecting the voltage of the DC bus at the current moment, and selecting the corresponding control mode according to the voltage mode until the switched reluctance motor stops rotating. In the technical solution provided by this application, the speed of the switched reluctance motor is reduced by controlling the on-off of the winding of the switched reluctance motor through the braking mode, and then the corresponding control mode is selected according to the bus voltage until the switched reluctance motor stops rotating. The discharge mode consumes the induced electric energy generated in the braking mode, which replaces the original discharge resistor, eliminates potential safety hazards while ensuring the safety of the DC bus voltage, reduces hardware costs, and saves the occupation of switched reluctance motors space. At the same time, the present application also provides a device and system for braking a switched reluctance motor, which have the above beneficial effects.
Description
technical field [0001] The present application relates to the field of switched reluctance motors, in particular to a method, device and system for braking a switched reluctance motor. Background technique [0002] Switched reluctance motor is a new type of speed regulating motor. The speed regulating system has the advantages of both DC and AC speed regulating systems. It is a new generation of stepless speed regulating system following the frequency conversion speed regulating system and the brushless DC motor speed regulating system. It has a simple and firm structure, wide speed regulation range, high efficiency in the whole speed regulation range, and high system reliability. Due to the characteristics of small starting current, large starting torque, frequent starting, positive and negative rotation, and easy regenerative braking, it is widely used in electric vehicle drives, mines, oil fields, textile machinery, household appliances and other fields. [0003] In the ...
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IPC IPC(8): H02P6/24
CPCH02P6/24
Inventor 倪祖根
Owner KINGCLEAN ELECTRIC