Electric drives and electric equipment

Abstract

The invention provides an electric driving device and electric equipment. The electric driving device provided by the invention is arranged in the electric equipment and used for driving the electric equipment and comprises a switch reluctance machine, a direct-current power supply, an instruction issue part, a feedback signal, a controller, a driver and a power converter. The electric driving device is characterized in that the switch reluctance machine comprises j multiphase winding units which are mutually independent and the same in parameters, the power converter comprises j power conversion units which are mutually independent and the same in parameters, the j power conversion units are correspondingly connected with the j multiphase winding units in a one-to-one mode, each power conversion unit comprises k power conversion circuits which are mutually in parallel connection and the same in parameters and used for providing k paths of currents for the corresponding multiphase winding units, the driver comprises j driving units which are mutually independent and the same in parameters, the j driving units are connected with the j power conversion units, the k is a positive integer larger than 2, and the j is a positive integer larger than 1.

Description

technical field [0001] The invention belongs to the field of switched reluctance motors, in particular to an electric driving device and electric equipment including the electric driving device. Background technique [0002] With the increase in the number of days and duration of smog in major cities, the country has become more and more strict on the exhaust emission management of fuel equipment; in addition, in a closed indoor working environment, the use of fuel equipment is prohibited; in addition, oil as an energy source It is non-renewable and will face depletion in a few decades. Therefore, electric equipment using electricity as an energy source, such as electric vehicles, electric forklifts and other electric equipment, is more and more favored by manufacturers and consumers. Not only does it have low pollution, it can provide electric energy through renewable energy, and compared with fuel equipment, it also has the advantages of high energy utilization rate, simp...

AI Technical Summary

Problems solved by technology

Although the time of the turn-on process and the turn-off process is very short, the power switch tube cannot withstand the motor line current exceeding the maximum continuous operating current in this short period of time.

[0010] With the increase in the number of power switch tubes connected in parallel, it is more difficult to ensure the consistency of their switching characteristics, resulting in poorer current sharing effect, higher possibility of damage, and more serious problems

Since the parallel current sharing technology cannot ensure that any number of parallel power switch tubes are turned on and off at the same time, it seriously affects and limits the increase in the capacity of the high-current power converter, making the drive of a high-current motor a difficult task. hurdles to cross

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