MDM-25SL56

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The MDM-25SL56 is a kind of 5-level single phase PWM AC motor speedcontroller based on the MCU and power electronic technology. It has theadvantage of high reliability, low cost, low power consumption, compactstructure and so on. It is widely used in air conditioners, fans, pumps,household appliances, textile machinery, medical equipment and otherindustrial control. It is suitable for the application of single-phasecapacitor-start, capacitor-run asynchronous motor.

MDM-25SL56 is suitable for powers of 1kW to 10kW, with high controlaccuracy, fast response and low motor starting current. The motor canrun at variable speed and it also has over-temperature protection,short-circuit protection and overload protection functions. In addition,it has a number of protection functions to ensure the safety of themotor.

The working principle of MDM-25SL56 motor control speed control isthe pulse width modulation (PWM) control. It is based on thecomparison between the reference speed command, which is given by theuser, and the actual speed of the motor. The MCU of the controllercompares these two signals and then it can produce an adjustmentsignal which can control the frequency of the pulse signal output bythe power switch. This pulse width modulation (PWM) signal cancontrol the on and off time of the switch，and thus to realize themotor speed control.

The frequency of the PWM signal output by the controller isgenerally fixed. There is no need to adjust it in practical use, andthe adjustment can be realized by changing the pulse width. Byadjusting the pulse width of the motor, the output power of the motorcan be changed and the speed of the motor can be adjusted. Thisadjustment method is mainly used in the single-phase AC motor.

The MDM-25SL56 motor control speed controller also has a realizationfunction of the speed command pattern. Under this mode, the user canissue a series of commands through a computer or a switch board. Thecontroller will follow these commands as a reference and adjust the speedof the motor accordingly. This realization function is generally used inthe field of automatic production, etc.

The MDM-25SL56 motor control speed controller is also equipped withmultiple protection functions. It can protect the motor and the system,and can effectively reduce the occurrence of fault states and ensurethe safe and reliable operation of the system.

To sum up, the MDM-25SL56 motor control speed controller hasadvantage of high reliability, low cost, low power consumption, compactstructure and multiple protection functions. It is widely used in airconditioners, fans, pumps, household appliances, textile machinery,medical equipment and other industrial control applications.

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