Frequency converter power supply protection device and method and frequency converter
A technology for protection devices and frequency converters, applied in the field of frequency converters, can solve problems such as potential safety hazards, false triggering of frequency converter faults, device damage, etc., and achieve the effect of improving safety and ensuring stability
Pending Publication Date: 2021-11-30
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
[0004] The object of the present invention is to provide a protection device, method and frequency converter for a frequency converter power supply, so as to solve problems such as fault triggering and device damage of the frequency converter when the stability of the frequency converter power supply is insufficient. The potential safety hazards brought about by the stability of the power supply can be achieved by protecting the power supply of the frequency converter to ensure the stability of the power supply of the frequency converter to improve the safety of the frequency converter
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[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0030] According to an embodiment of the present invention, a protection device for a frequency converter power supply is provided. see figure 1 A schematic structural view of an embodiment of the device of the present invention is shown. The frequency converter power supply includes: more than two switching power supplies. Each power device in the switching po...
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The invention discloses a frequency converter power supply protection device and method and a frequency converter. The device comprises switch units, sampling units and a control unit, wherein each switch unit controls the switch-on or switch-off between a switching power supply controlled by the switch unit and the frequency converter; each sampling unit samples the temperature of the temperature sampling position where the sampling unit is located, and the temperature is recorded as the working temperature of the corresponding power device in the corresponding switching power supply; and the control unit is used for controlling the switch-on or switch-off of the switch unit corresponding to the corresponding switch power supply in the more than two switching power supplies according to the working temperature of the corresponding power device in the corresponding switching power supply in the more than two switching power supplies so as to control one switching power supply in the more than two switching power supplies to supply power to the frequency converter in a switching manner. According to the scheme, the frequency converter power supply is protected, the stability of the frequency converter power supply is ensured, and the safety of the frequency converter is improved.
Description
technical field [0001] The invention belongs to the technical field of frequency converters, and in particular relates to a protection device, a method and a frequency converter for a frequency converter power supply, in particular to a temperature control redundant protection circuit, a method and a frequency converter for a high-power frequency converter power supply. Background technique [0002] In the magnetic levitation centrifuge unit, the high-speed and high-power frequency converter is a very important component. The high-speed magnetic levitation technology requires a stable and reliable power system, and the main control system of the frequency converter needs to reduce the frequency conversion while ensuring the sensitivity of the sampling function and the timeliness of the protection function. False triggering of faults caused by power supply stability and device damage. [0003] The above content is only used to assist in understanding the technical solution of...
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Login to View More IPC IPC(8): H02M1/32H02H7/12H02H5/04H02M1/36H02M3/335
CPCH02M1/32H02H7/1213H02H5/042H02M1/36H02M3/33561
Inventor 谢汉融张良浩于安波花峰海李思琪
Owner GREE ELECTRIC APPLIANCES INC