Motor Control Circuits
- Understand the recommended procedure for a basic motor installation based on NEC Article 430.
- List and describe the methods by which a motor can be started. full voltage, or across-the-line, Contact starter
- Comprehend the operation of reversing and jogging motor control circuits. Reversing start and a jogging circuit to bump a motor to move a little
- List and describe the methods of stopping a motor.
Electrical Braking and Mechanical Braking
- Comprehend the operation of basic speed control circuits.
Show Soft Starter, VFD and DC Motors controls
Motor Control Electronics
- Understand the operation and applications of different types of diodes. The PN-junction diode is the most basic of semiconductor devices.
The most important operating characteristic of a diode is that it allows current in one direction and blocks current in the opposite direction.
A reverse-bias voltage widens the depletion region so the diode does not conduct.
The diode blocks current when the anode is negative with respect to the cathode.
A zener diode permits current to flow in the forward direction and also in the reverse direction if the voltage is larger than the breakdown zener voltage.
- Understand the operation and applications of different types of transistors.
- The transistor is a three-terminal semiconductor device commonly used to amplify a signal or switch a circuit on and off.
- Amplification is the process of taking a small signal and increasing the signal size.
- Transistors are capable of extremely fast switching with no moving parts.
- Understand the operation and applications of different types of thyristors.
- Thyristor is a generic term for a broad range of semiconductor components used as electronic switches
- Thyristors have no linear in-between state as transistors have.
- In addition to switching, they can also be used to adjust the amount of power applied to a load.
- Thyristors are mainly used where high currents and voltages are involved.
- The silicon controlled rectifier (SCR) and triac are the most frequently used thyristor devices.
- Like a mechanical switch, a thyristor has only two states: on (conducting) and off (not conducting)
- Understand the operation and circuit function of different types of Integrated circuits.
An integrated circuit (IC), is a semiconductor wafer on which thousands or millions of tiny resistors, capacitors, and transistors are fabricated.
Integrated circuits may be categorized as either digital or analog, depending on their intended application.
Digital ICs operate with on/off switch-type signals that have only two different states, called low (logic 0) and high (logic 1).