Nine-speed adjustable DC power supply circuit diagram

The nine-speed adjustable DC power supply is mainly composed of a regulated three-terminal adjustable integrated block (m31) as the core component, and the LM317 adjustable termination has three tubes VT. The potentiometer RP and the resistor R3 R10 can be called to meet the output requirements. Different power supply voltages.
When making, the transformer T may utilize the power transformer of a 12-inch black-and-white television set. It can also be self-winding, using GEB22828 silicon steel sheet primary coil with 0.7MM enameled wire winding 158匝, so the secondary output voltage of the transformer is 25V AC voltage.
The voltage regulator part IC adopts LM317 voltage regulator integrated circuit. By shifting S2, the output terminal X3 and X4 can obtain a fixed nine-speed DC voltage. If the potentiometer RP is adjusted, it can be arbitrarily selected between 0 and 24V. The values ​​of R3 to R10 in the figure are for reference only.
In order to avoid temporary disconnection or poor contact in the use of the transfer switch S2, the output voltage is too high and the load is damaged. Here, a triode VT is provided.

About Corona Resistance Enameled Round Copper Wire.

  Capable of working under extreme situations where strong resistibility against very high and low temperature, powerful cryogn,hard radiation and forceful heat shock are needed.

  Be suitable for refrigerator compressor and aire condition compressor, microwave oven electric instrument and other pressuring motor.

Products Feature.

Name	Corona Resistance Enameled Round Copper Wire
Conductor	Copper
Dimension(mm)	Diameter: 0.20 ~ 2.50
Thermal Class(℃)	200(Class C);
Standard	J B / T 10930-2010
Packing	PT 4 – PT 200 or ply-wood spool
Application	Variable frequency motor, speed regulating motor, lifting motor, elevator motor and other fields.

Corona Resistance Enameled Round Copper Wire

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