Three-leg inverter-driven motor system, phase sequence detection method and device of motor system

A technology of phase sequence detection and three bridge arms, which is applied in the direction of output power conversion device, control system, AC motor control, etc., can solve the problems of easy leakage, short service life, easy heating, etc., and achieve frequency conversion speed regulation, The effect of improving the service life and reliability

Inactive Publication Date: 2017-06-23
GUANGZHOU BEDFORD ELECTRIC EQUIP
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Problems solved by technology

[0003] The single-phase capacitor split-phase motor is a motor that divides the single-phase voltage into two-phase voltage through the split-phase capacitor. The split-phase capacitor is a capacitor that is easy to leak, heat and break down under high voltage, so the service life is longer Short, the single-phase capacitor split-phase motor needs to provide power for other execution equipment continuously for a long time, so in the process o

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  • Three-leg inverter-driven motor system, phase sequence detection method and device of motor system
  • Three-leg inverter-driven motor system, phase sequence detection method and device of motor system
  • Three-leg inverter-driven motor system, phase sequence detection method and device of motor system

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[0027] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0028] see figure 1 , figure 1 It is a schematic structural diagram of a motor system driven by a three-bridge-arm inverter of the present invention.

[0029] The motor system driven by the three-leg inverter in this embodiment may include: a three-leg inverter 10 and a two-phase asymmetric motor 20; wherein the two-phase asymmetric motor includes: a main winding and auxiliary winding; wherein, the number of turns of the main winding is not equal to the number of turns of the auxiliary winding; the three-bridge-arm inverter includes: a first bridge arm, a second bridge arm, and a third b...

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Abstract

The present invention provides a three-leg inverter-driven motor system as well as a three-leg inverter-driven motor system-based phase sequence detection method and device. The system comprises a three-leg inverter and a two-phase asymmetrical motor; the two-phase asymmetrical motor comprises a main winding and an auxiliary winding; the first output end of the three-leg inverter is connected with the first end of the two-phase asymmetrical motor; the first output end of the three-leg inverter is electrically connected with the emitter of a first power switch tube and the collector of a second power switch tube; the second output end of the three-leg inverter is connected with the second end of the two-phase asymmetrical motor; the second output end of the three-leg inverter is connected with the emitter of a third power switch tube and the collector of a fourth power switch tube; the third output end of the three-leg inverter is connected with the third end of the two-phase asymmetrical motor; and the third output end of the three-leg inverter is connected with the emitter of a fifth power switch tube and the collector of a sixth power switch tube. The service life of the system can be prolonged, and the reliability of the system can be improved.

Description

technical field [0001] The invention relates to the technical field of inverters, in particular to a motor system driven by a three-leg inverter and a phase sequence detection method and device thereof. Background technique [0002] An inverter is a converter that converts direct current into alternating current, and the three-leg inverter is one of the most commonly used inverters at present. Since the inverter can output alternating current, it is widely used to drive high-power equipment such as motors. [0003] The single-phase capacitor split-phase motor is a motor that divides the single-phase voltage into two-phase voltage through the split-phase capacitor. The split-phase capacitor is a capacitor that is easy to leak, heat and break down under high voltage, so the service life is longer Short, the single-phase capacitor split-phase motor needs to provide power for other execution equipment continuously for a long time, so in the process of using the inverter to driv...

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Application Information

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IPC IPC(8): H02P27/08H02M7/5387
CPCH02M7/53873H02P27/085
Inventor 张学美张淼唐雄民
Owner GUANGZHOU BEDFORD ELECTRIC EQUIP
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