The relay plays a role in the circuit such as automatic adjustment, safety protection, conversion circuit and the like. Environmental service requirements are not high, industrial control relays, relays used in industrial control, contact load power, long life. So, for relays, what are the main areas of application?
1. Household Appliances: Air-conditioning relays are mainly used to control compressor motors, fan motors and cooling pump motors to perform related control functions.
Household appliance compressor motors typically have a power of 1 to 3 horsepower; fan motors and cooling pump motors have 1/4 to 2 horsepower. Due to the load start-up moment, a large inrush current occurs, which is approximately 6 times the full-load operating current. The time required for the compressor motor to reach full speed is long, which poses a serious threat to the relay contacts. Therefore, it is required that the load capacity of the relay be adequately margined; it is required to eliminate the contact jump-back when the relay is actuated; The control board relay releases quickly, minimizing contact bounce. The safety requirements are strict and must be confirmed by the safety certification body.
2. Industrial control relay: In industrial control, the main control function is completed by universal AC relay. The relay is usually driven by a button or a limit switch. The contacts of the relay can control the solenoid valve, the larger starter motor and the indicator light.
The voltage is generally 24VDC, 220VAC. The digital control field has expanded the application of the relay. Copy milling and coordinate boring are programmed by data, and signals are sent to machine controllers, memory units, and other logic components to control two to five axes of coordinate servo motors. With this automatic control method, drilling machines, hexagonal lathes, ordinary lathes and automatic profiling machines can be easily controlled.
3. Automotive: The automotive industry is increasingly using relays.
The more common automotive relays are: starter motor start relay, relay relay, motor or generator disconnect relay, charging voltage and current adjustment relay, transition signal flash relay, light brightness control relay and air conditioning control relay, sliding door automatic opening and closing Control relays; glass window lift control relays.
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