Electric drives and electric equipment

Abstract

The invention provides an electric driving device and an electric device. The direct-current electric driving device is arranged in the electric device and used for driving the electric device and comprises a direct-current motor, a direct-current power supply, an instruction sending portion, an output sensor, a current sensor, a controller, a driver and a chopper. The electric driving device is characterized in that the direct-current motor is provided with 2j mutually-independent armature winding branch circuits consisting of m windings, 2j*m commutator segments connected with the windings and 2j mutually-independent electric brushes connected with the chopper and in contact with the commutator segments, wherein the driver is provided with j mutually-independent driving units, the chopper is provided with j mutually-independent chopping units, each driving unit is connected with one corresponding chopping unit, each chopping unit is connected with one corresponding electric brush, and both j and m are positive integers no less than 2.

Description

technical field [0001] The invention belongs to the field of direct current 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 and can use the electric energy provided by renewable energy, but it also has the advantages of high energy utilization rate, simple structure, low noise, good d...

AI Technical Summary

Problems solved by technology

[0004] In the current DC electric drive device, the requirements for the power switch tube are extremely strict. During normal operation, the power switch tube must work below the maximum operating temperature, maximum operating current and maximum operating voltage. Once any one of the conditions is exceeded, the power switch The tube will be damaged; in addition, when the component parameters in the electronic circuit change beyond the normal operating range, overvoltage or overcurrent may be generated in the power switch tube, resulting in damage to the power switch tube and causing electrical equipment failure; in addition, With the increase of the working time, the power switch tube will age, and the performance indicators such as the maximum working temperature, the maximum working current and the maximum working voltage will all decrease accordingly, and it is very easy to cause the damage of the power switch tube to cause the failure of the chopper as a whole or short circuit. And then lead to electrical equipment failure or even safety accidents

[0005] High-power electric drives and electric equipment, especially low-voltage high-current electric drives and electric equipment, require controllers or choppers with large continuous operating currents, and related technologies and products are controlled and monopolized by individual countries and companies. As a result, the price is very high, and the current value output by high-performance motor controllers or choppers that can be purchased on the market is only below 1,000 amperes

In the final analysis, many reasons, such as production level, parallel current sharing technology of multiple power switch tubes, control circuits and algorithms are too complicated, have seriously restricted and affected the development of low-voltage and high-current electric drive devices and electric equipment.

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