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Help CenterSCC-CEL3020 Programmable Logic Controller
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Compared with ordinary motors, variable frequency motors do not have much difference in appearance, but there are significant differences in performance and usage between the two. Variable frequency motors are powered by variable frequency power sources or frequency converters, and the speed of the motor can vary. There are constant torque and constant power variable frequency motors, while ordinary motors are powered by power frequency power sources, and their rated speed is relatively fixed.
The ordinary motor fan rotates simultaneously with the motor rotor, while the variable frequency motor relies on another axial flow fan for heat dissipation. The speed of the fan is fixed, which can ensure the heat dissipation requirements of the motor during low-speed operation. Therefore, when ordinary fans are used with frequency conversion and run at low speeds, they may burn out due to overheating.
In addition, due to the need to withstand high-frequency magnetic fields, the insulation level of variable frequency motors is higher than that of ordinary motors. There are special requirements for slot insulation and electromagnetic wires of variable frequency motors to improve their resistance to high-frequency shock waves.
Variable frequency motors can adjust speed within their speed range without damage, while general power frequency motors can only operate under rated voltage and frequency conditions. Some motor manufacturers have designed broadband ordinary motors with a small adjustment range, which can ensure the use of frequency conversion in a small range, but the range should not be too large, otherwise the motor may be burned out due to heating.
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Signal input
Signal type: Transistor (PNP&NPN compatible)
NPN signal level (input): NPN: 0-5VDC
PNP signal level (input): PNP: 15-30VDC
Single channel consumption current: 5mA
Port protection (input): overvoltage impact protection
Input characteristics: NPN/PNP (compatible)
Electrical isolation: AC 500V
signal output
Signal type: relay
Rated level: relay 250VAC/30VDC
Single channel rated current: Relay: 5A
Port protection (output): overvoltage and overcurrent protection
Electrical isolation: AC 500V
General parameters
Protection level: IP20
Working temperature: 0-55 ℃
Storage temperature: -25~85 ℃
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