Switching power supply applied in direct-current speed regulator

Abstract

The invention discloses a switching power supply applied to the interior of a direct-current speed regulator. The circuit comprises a single-phase alternating-current power supply input AUX1F, a single-phase alternating-current power supply input AUX2, an inductor L1, a rectifier D24, a switching power supply adjusting chip IC8, a transformer T15 and an adjustable voltage reduction chip IC5, wherein the single-phase alternating current power supply input AUX1F and the single-phase alternating current power supply input AUX2 are respectively connected with the input end of the inductor L1; theoutput end of the inductor L1 is connected with the input end of the rectifier D24; the output end + of the rectifier D24 is connected with the winding ends 3 and 4 of the transformer T15; a winding end 23 of the transformer T15 is connected with a pin 12 of the switching power supply adjusting chip IC8; the switching power supply applied to the interior of the direct-current speed regulator solves the problem that an alternating-current input power supply 110VAC-240VAC is converted into + 24V, + / -15V and 5V for supply, and normal operation of a low-voltage circuit in a product is guaranteed.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a switching power supply used in a DC governor. Background technique [0002] In the prior art, a general-purpose switching power supply module or circuit board is selected and connected to the inside of the product for power supply. The disadvantages and deficiencies are as follows: [0003] 1. General-purpose modules are costly, bulky, take up a lot of space, and cannot dissipate heat; [0004] 2. At present, it is difficult to select a switching power supply module in the market that can simultaneously supply +24V, + / -15V and 5V output requirements, and the power of each voltage meets the needs of the product. If more than one power supply module is selected, the space occupied will be further increased. The increase will bring more difficulties to the volume of product design. Contents of the invention [0005] The object of the present invention is to provide a s...

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Problems solved by technology

[0003] 1. General-purpose modules are costly, bulky, take up a lot of space, and cannot dissipate heat;

[0004] 2. At present, it is difficult to select a switching power supply module in the market that can supply +24V, + / -15V and 5V output at the same time, and the power of each voltage meets the needs of the product. If more than one power supply module is selected, the space occupied will be further increased. The increase will bring more difficulties to the volume of product design

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