A fluid loop circulation pump driver

Abstract

The invention discloses a fluid circuit circulating pump driver, which relates to the field of aerospace engineering. The actuator is adapted to drive the fluid loop circulating pump motor, comprisesa digital-to-analog conversion module, an analog control module and a drive module connected in turn, the drive module is connected with the circulating pump motor, wherein the digital-to-analog conversion module is used for acquiring a digital control signal for controlling the rotational speed of the circulating pump motor, The digital control signal is converted into the analog control signal.The analog control module is used for pulse width modulation of the analog control signal to generate a driving signal. The driving module is used for power amplification of the driving signal and sent to the circulating pump motor. The driver provided by the invention does not contain a high-cost microprocessor immune to the space environment, adopts a pure analog circuit control mode inside thedriver, has wide speed regulating range and high rotational speed stability, has strong simple anti-interference ability of an external digital control interface circuit, and meets the electromagneticcompatibility requirements.

Description

technical field [0001] The invention relates to the field of aerospace engineering, in particular to a fluid circuit circulation pump driver. Background technique [0002] In the space station engineering project, the fluid circuit runs through the circulation pump inside the system, and through the adjustment of the regulating valve, the flow rate of the working medium for temperature control is distributed to each experimental cabinet and equipment, so that the temperature of each experimental cabinet and equipment is maintained within the allowable range It ensures the normal operation and function realization of space application payloads. The circulation pump driver is the core power component of the fluid circuit. Therefore, the reliability of the circulation pump driver has a direct impact on the reliability of the fluid circuit and even the reliability of the entire space application system. [0003] However, the existing ground-use motor drivers cannot be directly ...

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Problems solved by technology

[0003] However, the existing ground-use motor drivers cannot be directly applied in the space environment. The drivers designed for aerospace products in the industry are usually fixed-speed or step-by-step adjustment, which lacks scalability for space application systems; drivers that can continuously adjust the speed are generally used. The design is based on a microprocessor (DSP or FPGA), and the cost of choosing a microprocessor that is not sensitive to the space environment is very high. The chip area and peripheral circuits will make the driver unable to reduce the size to achieve miniaturization; The analog control is susceptible to interference and cannot meet the high reliability requirements of aerospace applications

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