1. Pulse-width modulation (PWM) is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors
2. The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load
3. The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies
4. The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on
5. The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there being practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle
You can adjust the speed of the motor and the rotation direction
The max current of this controller is 40A
Make sure the positive and negative connections are correct before power on. The wiring must not touch the heat sink, and it may burn down the circuit board
Note that this is not a power module, it must be connected to the motor to speed. If not, multimeter output won't change
Can not be connected to AC power. Suitable for brush motor
With positive and negative switch, potentiometer knob with switch, can use PLC to control the positive and negative inversion
Power Requirement: DC 10-50V
Rated Current: 40 A (Maximum Output Current)
Frequency: 25 kHz
Control Motor Power: 0.01-2000 W
12 V: 480 W (max), 24 V: 960 W (max)
48 V: 1920 W (max), 50V: 2000 W (max)
Regulation Range: 0-100%
Function: Forward to Stop to Reverse
PCB Size: 10x7.6x2.7cm/3.94x2.99x1.06inch
Quantity: 1 Pc
1 x DC Motor Speed Controller
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On 03-Nov-2023 at 02:34:38 GMT, seller added the following information: