Inverter, inverter control method and motor system

Abstract

The invention relates to an inverter, an inverter control method and a motor system. The inverter comprises a control device and a single-phase control circuit, the single-phase control circuit comprises more than two bridge arm circuits, and each bridge arm circuit comprises an upper bridge arm control switch and a lower bridge arm control switch. One single-phase control circuit in the inverter comprises more than two bridge arm circuits which are connected in parallel, the plurality of bridge arm circuits can be conducted in a staggered manner, the switching times of each control switch in each bridge arm circuit are shared, the equivalent switching frequency of the inverter is improved, the upper limit of the switching frequency is improved, the actual switching frequency of a single control switch of the inverter is in a low range, large temperature rise is not caused, the effect of inhibiting the eddy current loss of a rotor is achieved, high-efficiency and ultra-high-speed operation control of a motor is achieved, and the use reliability of motor driving is improved.

Description

technical field [0001] The present application relates to the technical field of inverters, in particular to an inverter, an inverter control method and a motor system. Background technique [0002] With the increasing concern of energy and environmental issues, fuel cell technology has attracted people's attention. Due to the high energy density of fuel cells and their inherent advantages in the field of heavy load and long-endurance transportation, fuel cell technology is usually used in automobiles, which effectively improves the working performance of automobiles. [0003] Fuel cell vehicles have two core systems, one is the battery stack, and the other is the compressed air and hydrogen supply system. In order to achieve high energy conversion efficiency, the chemical reaction inside the fuel cell has strict requirements on the parameters of air temperature, humidity, pressure and flow. An ultra-high-speed air with superior performance and can be well matched with the ...

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Problems solved by technology

[0004] The traditional method of driving ultra-high-speed air compressors usually uses IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) to realize three-phase motor drive. The loss is very large, the heat dissipation is difficult, the temperature rises, and the high switching frequency will also cause the problem of large current harmonics. The traditional method of driving the motor is not reliable

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