How to make a speed controller for a DC motor at 220V?

Artem asks:

Hello! Please tell me how you can make a simple power regulator for an electric motor of 800 watts, direct current, at the output after the bridge and Conder 310v. Please indicate the labeling of radio components, the scheme and principle of operation. Very necessary! Thank!

The answer to the question:

Hello! After the bridge and the Conder, it is likely to sag under load. A good way is to assemble a PWM controller. Use a MOSFET transistor as a power element. You can assemble, as an option, on the NE555 chip. I enclose the scheme below. As for the principle of work, I did not understand what exactly to paint? What is PWM and how does it work? This will take a lot of time and to answer the question is too much information. The principle of operation of this circuit consists in a cyclic charge from the power source and the discharge of capacitor C1 to the output of the DISCH IC through different resistors, due to which a duty cycle is formed. Separation of charge and discharge circuits is carried out through diodes VD4 and VD6.

Are you just rectifying the mains voltage? Try the usual triac controller (dimmer) - should work. Buy a dimmer in electrical products or in radio products in the form of a board, they are sold without cases, if the simistor is without a radiator - then buy a radiator or screw an aluminum or copper plate to the triac, more, but without fanaticism - see for heating. When connecting to the network, it is better not to touch the radiator with your hands. Ideally, isolate the triac from the radiator with a thermal pad, and screw through a plastic sleeve. A dimmer to buy at 1.5-2 kW, you can more.

Does the motor need to be supplied with direct current? Are you sure this is not a universal collector machine?

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