lcd module for 50a dc pwm motor speed controller assembled quotation

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Vary the speed of your large DC motor (up to 50 Amps) with this heavy-duty circuit without sacrificing torque. Gear boxes can be costly and series resistors may cause stalling and overheating. This circuit delivers the voltage to DC motors with pulses and the speed is controlled via pulse-width modulation (PWM). This model also allows you to vary the frequency of the pulse.  MX068.

This PWM DC motor controller circuit can be used for generating hydrogen (Brown’s gas), build your own fuel cell station. More common uses include controlling DC motors in golf carts, buggies, RC cars, robotics, DC hobby motors, toy DC motors, etc. Additional cooling (fan cooling) may be required depending on current load and frequency.

Control the speed of a DC motor without sacrificing torque. This Pulse-Width-Modulation (PWM) DC motor controller can provide up to a maximum continuous current of 50A to your DC motor or other DC load thanks to a digital microcontroller based (PIC) design and highly efficient High-Power MOSFET for cooler operation.An optional LCD module (CanaKit part # LCD1133) is also available that will precisely indicate the currently set frequency and duty cycle for accurate control of the PWM signal.The controller has two modes of operation: Fixed or Variable frequency. The fixed frequency mode of operation runs the controller at 100 Hz. In the variable frequency mode of operation, the frequency is adjustable from 244 Hz to 3.125 KHz. Duty cycle is fully adjustable from 0% to 100% in both modes.The controller also offers built-in soft-start feature that greatly reduces the mechanical stress on the motor as well as the electrodynamic stress on the attached cables and battery therefore extending the life span of the whole system. When power is connected to the circuit, the duty cycle will start from 0% and go up to the preset value in about 1 to 1.5 seconds.A 12V DC fan is included with the motor controller for robust reliable continued operation under heavy loads. Please note that DC fan is only designed to work with a supply voltage of up to 12V DC. Applications: Motor Control, HHO, DC / LED Light Dimmer, Heating Control, etc.Dimensions: 4.03" x 2.82"

*The purchaser is solely responsible for the design and application and assumes all risks.It is the purchaser"s responsibility to properly protect the unit from overload.BatterySpace.com shall not be liable for any damages to equipment, any bodily harm or responsible for units damaged by improper hook up or overloading! If BatterySpace.com inspection determines a unit to be defective, we will either repair, replace or refund the purchase price at our option. Final warranty lies with original manufacturer of the product module.

Make sure that motors work with total precision by sourcing the right motor controller for any situation. Alibaba.com"s wholesale store is the ideal place to pick up a pwm motor drive module or any other style of controller. And finding the right model could make a big difference. These small devices are designed to govern the way motors operate, providing precise instructions about speed and function. With the right control system, you can calibrate hard drives, sound systems and industrial devices, and operate them exactly the way you desire.

Take control over motor operation with a motor controller from our extensive electronic accessories store. There are controllers for every motor type, so if you are calibrating a servo or Arduino unit, search for a suitable match. But there are also more general controllers which are designed to suit various motor wattages and voltage ratings. Find one that fits the specifications of your motor to make sure that they combine seamlessly. These controllers can be simple or complex, with programmable options for more advanced applications. Again, with our search tools you can find a pwm motor drive module that does exactly that you need it to do.

Explore specialist motor controller varieties for industrial machinery like sintering units. Source controllers that have been designed for hydroponic growing setups, or pick up a controller for an e-Bike motor when repairs are needed. More broadly, you"ll also find controllers designed to work with 3-phase AC induction motors, AC synchronous, and DC synchronous motors. Be sure to pick a controller that fits your motor type, and you"ll soon be in total command of how your device functions. Whether you need a pwm motor drive module or any other controller, Alibaba.com"s wholesale store has what you need.

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The DC Motor Speed Controller allows controlling direction of a DC motor using a Pulse-Width-Modulated (PWM) DC voltage with a Duty Cycle fully adjustable from 10%-100%. The motor speed controller can provide a continuous current of 8A to your DC motor or other DC load. The circuit also includes a 10A fuse, with the reverseread more...

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The causes and effects of VFD-supplied motor shaft and bearing currents, as well as measures to counteract them, have been exhaustively covered in literature. However, as a drive and motor supplier, we frequently receive requests for information on this topic. So a summary seems in order…

Basically, shaft currents are induced because of the high frequency of the voltage pulses sent to the motor from the VFD. Recall that a pulse-width modulated VFD creates a synthesized sine wave by firing its output transistors many thousands of times per second. These pulses form high-frequency waves sent along the motor cable to the motor. Since impedance is inversely proportional to frequency, the capacitances of the cable and motor present little or no impedance to these high-frequency pulses. As a result, circulating currents can readily flow in the motor shaft. With sufficient magnitude, and in the absence of corrective measures, these shaft currents can pass through the bearings and races to the motor frame, causing bearing pitting or “fluting” – regular, tightly spaced grooves on the bearing races – via a process referred to as Electric Discharge Machining (EDM). Ultimately, these irregularities will cause bearing failure.

What can be done to reduce the likelihood of premature bearing failure? Corrective measures fall into two main categories, which for simplicity’s sake I will call electrical and mechanical, and they each present advantages and disadvantages. Some common ones are as follows:

Drive output filtering: Most commonly used are referred to as dV/dt filters, dV/dt representing the rate of rise of the voltage pulse with respect to time. This is basically an inductive impedance introduced to slow the rate of rise of the voltage pulse. By reducing voltage stresses imposed on the motor, effective dV/dt filters have been shown to reduce common mode currents by up to 30%. And common mode currents are one of the primary causes of bearing damage.

Insulated bearings: a non-conductive material is used to isolate the bearings. Due to expense and to the relatively lower probability of bearing problems on small motors, insulated bearings are normally used on IEC frame 315/NEMA frame 500 or larger motors. Insulated non-drive end (NDE) bearings are often standard, with insulated drive end (DE) bearings typically optional.

Note that there are other electrical and mechanical measures which have been tried over the years and found problematic and so are not mentioned above. For instance, electrostatically-shielded motors are available but tend to be too costly for anything but specific applications; and electrically conductive grease, which theoretically would bleed off charge slowly to prevent bearing voltages reaching a level where EDM could occur, has not been found to function consistently, being subject to wear, contamination and breakdown.

I hope this discussion has shed some light on measures which can be taken to enhance motor bearing life. If you have any questions or comments, please visit our Comments section. Or you can contact us at info@joliettech.com or visit our website, www.joliettech.com. Thanks for reading, and please join me next month for another column.