Pulse width modulation amplifier energy recovery system during aging process

Abstract

The invention discloses a pulse width modulation amplifier energy recovery system during an aging process, and belongs to the field of energy recovery and utilization. The pulse width modulation amplifier energy recovery system comprises a power supply and at least two stages of aging modules, wherein the at least two stages of aging modules are sequentially connected in series, the power supply is connected with the input end of the first-stage aging module, and the aging modules comprise control power supplies, test boards and power conversion circuits which are connected sequentially. According to the pulse width modulation amplifier energy recovery system during the aging process, the multiple aging modules are sequentially connected in series, a plurality of pulse width modulation amplifiers can be aged simultaneously under the condition that one power supply is used, the power conversion circuits convert energy output by the corresponding pulse width modulation amplifier into thepower supply of the next pulse width modulation amplifier and the energy returns to the power supply without adopting a power supply parallel method, the problem of power supply noise is avoided, meanwhile, and due to the structural characteristics of the power conversion circuits, the utilization rate of the energy is improved.

Description

technical field [0001] The invention relates to the field of energy recovery and utilization, in particular to an energy recovery system in the aging process of a pulse width modulation amplifier. Background technique [0002] The pulse width modulation amplifier is the core execution unit in the motor drive system, and is widely used in various high-value and high-reliability fields such as aviation, aerospace, weapons, ships, and electronics. [0003] In the production process of high-reliability electronic products, batch testing, screening, and aging are required. The pulse width modulation amplifier circuit has the characteristics of large output power (0.3-10KW), high output efficiency (96%-98%) and the like. Almost all the energy output by the PWM amplifier circuit will be dissipated to the load. When multiple PWM amplifier circuits (such as each output power 1.5KW, 100 circuit products) are aging at the same time, the energy dissipation on the load is about 150KW. ...

AI Technical Summary

Problems solved by technology

[0005] (1) When converting energy into a power supply and then connecting it in parallel with an external power supply, there is power supply noise, and how to suppress voltage noise and current noise is a difficult problem;

[0006] (2) In the case of using an external power supply and an electronic load, only one pulse width modulation amplifier can be aged, and the equipment utilization efficiency and work efficiency are low;

[0007] (3) This method returns the energy output by the pulse width modulation amplifier to the power supply after rectification, filtering and power conversion. Since the energy after rectification, filtering and power conversion is not used as a complete power supply, it will be When the energy is converted into a power supply and connected in parallel with the power supply, part of the energy will be lost, and the energy recovery rate is not high

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