Control Circuit Pdf

Pulse width modulation control circuits slvs084f april 1994 revised january 2002 post office box 655303 dallas texas 75265 1 complete pwm power control 3 6 v to 40 v operation internal undervoltage lockout circuit internal short circuit protection oscillator frequency.

Control circuit pdf. A very common form of latch circuit is the simple start stop relay circuit used for motor controls whereby a pair of momentary contact pushbutton switches control the operation of an electric motor. Control circuit shown in figure 1 3. L1 l2 m1 m1 start stop m1 motor to 3. If we wanted to keep the motor running even after the operator takes his or her hand off the control switch.

These basic relationships can be found in many control circuits. The contact in parallel with the run switch is often referred to as a seal in contact because it seals the momentary condition of the run switch closure after that switch is de actuated. The entire control circuit in this example is in parallel between line 1 and line 2. The interlock contacts installed in the previous section s motor control circuit work fine but the motor will run only as long as each push button switch is held down.

In this particular case i show a low voltage control circuit and a 3 phase higher voltage motor. Control circuit of forward reverse starter pdf you may also like. Control components are used in a wide variety of applications with varying degrees of complexity. 20 khz to 500 khz variable dead time provides control over.

Static switching control static switching control is a method of switching electrical circuits without the use of contacts primarily by solid state devices. To indicate static switching control use the symbols shown in this table enclosing them in a diamond as shown. Motor control wiring diagram pdf wiring diagram is a simplified usual pictorial representation of an electrical circuit it shows the components of the circuit as simplified shapes and the facility and signal associates with the devices. Single pole double throw.

One example of a simple control circuit is a circuit that turns a light on and off in this circuit the control component is often a single pole switch. Single pole single throw spdt. Notice that the stop pushbutton is in series with coil m and that the start pushbutton is in parallel with m contacts 2 3. Control circuit of dol starter control circuit of fully automatic starter auto transformer working and saving in copper material speed control of dc series motor.