Considerations for in-process processing. In the event of a battery failure, the use of fixed power generation will also cause the diesel engine to shut down. Because both the GFC and the FLC can not be combined at the same time in the principle design, in the conversion process, there must be an instant that does not attract at the same time, which may cause the auxiliary excitation to be de-energized and the auxiliary power does not generate electricity, and the control loop loses power and stops. . Even if the fixed power generation can be successfully converted due to the inductance of the auxiliary excitation winding, the reduction of the excitation current may still cause a shutdown phenomenon. The engine speed n is proportional to the product of the auxiliary excitation flux ,, and the flux Υ is proportional to the excitation current. When the diesel engine is running at the basic speed of 430rmin, the excitation current is also slightly reduced due to its low speed (excitation by the battery). ), the auxiliary power generation voltage is only about 40V; if the battery is burnt or faulty, when the diesel engine is at the basic speed, the auxiliary excitation is self-excited, and the excitation current is further reduced, then the auxiliary fixed voltage is less than 20V. The phenomenon of power failure or back to the handle is stopped.

Only by correctly understanding and mastering the characteristics of the air compressor soft start of the TPZ9 auxiliary machine control device can the auxiliary machine control device be used to reduce the occurrence of machine breaking accidents. In foreign countries, many large space environmental test equipments are equipped with 20K built-in cryogenic pumps, which have the advantages of high pumping speed and no pollution, especially for optical instruments such as satellite infrared remote sensing instruments, infrared cameras, infrared horizon meters, etc. There is no pollution, so that the test spacecraft can be launched directly. Considering the convenience of liquid nitrogen supply, it is more suitable to use a first-stage expander with liquid nitrogen pre-cooling in a gas-cooling refrigeration system, which increases the reliability of operation due to the reduction of the primary expander.

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