Variable frequency starting method and device and storage battery supply

Abstract

The invention relates to a variable frequency starting method and device and a storage battery supply. When a load is started to produce huge starting current, due to adoption of a mode of respectively setting the output voltage and the output frequency of a boosting inversion circuit into the voltage and frequency meeting the lowest load starting requirement, the load current rises slowly and slightly till reaching the rated voltage and the rated frequency when the load stably operates, and the increasing range of the load current in the starting process is limited to not exceed a safety range so as to protect a power device in a circuit. Because the onset voltage just can meet the starting requirement of the load and is far lower than the steady-stage voltage when the load operates, the load current in the starting process can be reduced under the condition of certain load resistivity; and the onset frequency calculated according to the onset voltage is also lower, the relative motion between a motor stator and a motor rotor of the load is in slow rise from sharp rise, the output power of the motor is reduced, the load current is reduced immediately, and therefore the purpose of limiting the huge starting current from two aspects is achieved.

Description

technical field [0001] The invention relates to a clean energy power supply method and system, in particular to a variable frequency starting method, a variable frequency starting device and a storage battery power supply. Background technique [0002] At present, households without electricity in remote mountainous areas or pastoral areas use integrated control inverters to generate electricity to meet electricity needs, such as integrated wind control inverters or integrated photovoltaic control inverters. The electric energy generated by the control inverter integrated machine is stored in the battery, and the direct current output by the battery is converted into alternating current by the inverter to supply power to the electrical appliances. When loads such as compressors of refrigerators and air conditioners and motors of microwave ovens are started from a static state, they must overcome static friction and the impact of the compressor drive coil of the refrigerator....

AI Technical Summary

Problems solved by technology

Although the super-large starting current has been reduced compared with the steady-state voltage, the speed of the motor load has not been changed, so the super-large starting current is still relatively large

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