DC motor speed controller

DC converter DC motor speed controller Product Overview SCR DC converterA: The device parameter1: Input voltage: Single phase 110V, 220V + -10%2: Output Voltage: DC 0-110V armature, or 0-220V100V or 200V excitation3: Rated output current: 25A 50A armatureEquipped with a motor: less than 7.5KW4: Output excitation current: 2A, 5A (10A 20A ...) 5: Speed range: 1:30 6: Static error rate: <5% 7: Locked current setting: 1.3 times rated current 8: for analog signal input, multi-motor synchronization, and PLC connectionII: Uses: JSC series single-phase half-controlled thyristor bridge DC converter DC converter, for less than 7.5KW power supply of various DC electric armature in order to achieve constant torque DC motor stepless adjustment speed. This device is a DC motor with a power supply, the motor can start and suddenly accelerated quickly and smoothly, sudden load dynamic downhill on a small, shorter recovery time. For wide speed range, steady speed and high precision mechanical transmission, such as light industrial machinery, plastics machinery, printing machinery, paper machinery, food packaging machinery and other industrial sectors, as a segment of small and medium DC motor drive, speed and steady speed effect. This device is also suitable for motor starting at full load full pressure of the occasion.Third: How it worksDC converter device consists of the starting points, voltage regulator, current regulator, phase trigger, thyristor rectifier, the current sample amplification, over-current direction, loss of field protection circuit.1: The starting points from the N4 / 2, C22, RP3 etc., when the sudden control voltage input, N4 / 2 state of the output was increased integration, enabling a flexible starting, acceleration and reduced overshoot, so that each times have a smooth start-up, to prevent the mechanical transmission of the intensity of impact. RP3 can change the integral adjustment starting time, the device adjust the range of 2-10 seconds.2: voltage regulator, current regulator with excellent performance are used PI-type regulator, the combined effects of the device's stability, fast are at their best.Voltage regulator from the N4 / 3, C16, R46, etc, have given their input voltage, the negative feedback voltage, current positive feedback voltage is superimposed. In the supply voltage, load fluctuations, and automatically adjusts the output voltage, the motor speed to maintain stability, adjusting RP1 to correct the mechanical hardness of the motor, adjust the RP4 stabilization device maximum output voltage.Current controller from the N4 / 4, C14, R38, D23, etc, due to the introduction of current negative feedback, when the load increases above a calm current, steady decline in the output voltage to output current will not rise; when the motor stall the output current is also calm in the rated current range, which effectively protects the unit and DC motors. Current regulator for stabilization of the maximum output current, so the motor full load, full pressure start, the current is also controlled at the rated current within the motor fast, smooth start. RP2 can change the maximum stabilization adjustment current.3: N4 / 1, R61, R64, R65, R70 etc current sampling amplifier, a current regulator and voltage regulator to provide control voltage. RP5 adjustment potentiometer for the speed table.4: N3 phase trigger for the dedicated integrated circuit, a phase shift range, output pulse stability and so on. D17 pulse power amplifier. Enough power to drive thyristor rectifier.5: N2 / 1, N2 / 2 for the fast thyristor rectifier modules, R16, for the AC input voltage absorbing varistor, R17 for the DC output voltage absorbing, R11, R12, C7, C8 for the thyristor switch resistance absorption capacity, the circuit as a thyristor, diode voltage protection.6: D1-D7 as the excitation power, D8 is connected to the magnetic field direction, N1, R2, R4, R3 for the loss protection circuit, when the power supply circuit when the motor field, N1 negative voltage output, cuts off, constant voltage, the output DC voltage drops to 0, to prevent the DC Motor Speed at the time of the phenomenon of loss of excitation, thereby protecting the motor and the device.7: D26 is connected to power on display, D30 for the over-current display. D8 for the excitation connected display.Four: The main advantage of 1: wide speed range, high precision, protecting sensitive, rational structure, can be used for more than one motor synchronous speed. According to user requirements can also be remote communication, analog input and output functions.Pat: Please note that when using the following:1: In accordance with the instructions carefully checked wiring can not be wrong, so as not to damage the device.2: When the machine is running, the ban on contact with metal objects inside the unit components.3: Control panel potentiometer in the factory have the right to adjust well, do not easily adjusted.4: repairs to professionals, in order to avoid failure scope.5: Use the oscilloscope for inspection, please note the oscilloscope power cord plug may not add ground. 6: Speed reference potentiometer resistance 4.7K--10K can be.