ขาย สวิทช์ควบคุมความเร็ว DC 10-50 V PWM ราคาที่ดีที่สุด

Descriptions: 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. 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. 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. 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. Feature: You can adjust the speed of the motor and the rotation direction. The max current of this controller is 40A. Note: 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 Specifications: 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 Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents: 1 x DC Motor Speed Controller