Motor and electrical control technology knowledge
16, relay
A relay is a control element that uses a variety of physical quantities to convert a power or non-electricity signal into an electromagnetic force (with contact) or a step change in the output state (no contact).
17, thermal relay
It is a protective device that works by the principle of the thermal effect of current.
18, AC relay
A relay that draws the coil current to AC.
19, full pressure start
When the motor capacity is small, the stator winding of the motor is directly connected to the power source and started at the rated voltage.
20, voltage
The potential difference across the circuit.
21, the contact
The contact, also called the contact, is the actuator of the electromagnetic appliance and functions as a switch-on and break-off circuit.
22. Electromagnetic structure
The electromagnetic mechanism is a sensing component of an electromagnetic appliance that converts electromagnetic energy into mechanical energy, thereby driving the contact action.
23, the arc
The arc is actually a discharge phenomenon caused by a gas between the contacts under the action of a strong electric field.
24, contactor
The contactor is an automatic control switchgear suitable for long-distance control, frequent operation of AC and DC main circuits and large-capacity control circuits in low-voltage power distribution systems.
25, temperature relay
A protective device that operates by indirectly reflecting the temperature of the winding by the overheating element is called a temperature relay.
26, jog circuit
When the jog button is pressed, the coil is energized and pulled, the main contact is closed, the motor is connected to the three-phase AC power supply, and the rotation is started; when the button is released, the coil is discharged, the main contact is disconnected, and the motor is powered off and stopped.
27. Electrical control system
The electrical control system is made up of electrical control components connected according to certain requirements.
28, variable pole speed
In the speed regulation of asynchronous motor, the speed control method of changing the pole number of the stator pole is used.
29, electrical components location map
The electrical component layout is a diagram used to indicate the actual mounting location of the components in the electrical principle.
30, electrical components wiring diagram
The electrical installation wiring diagram is a specific implementation form of the electrical schematic diagram, which is drawn by the specified graphical symbols according to the actual position and actual wiring of the electrical components.
