A step down transformer connected to an ac mains supply 220v

I have many treadmills motor of rating 180V 10A which I would like to use for power tools. Locally we have 220V ac 50Hz. I thought of using iron-core transformers. But having one for 1800W+ is expensive and bulky. There are also thoughts of using PWM. I know that high voltages probably help the motors overcome reactance quicker. But the pulsatile currents might decrease the torque. Can this be ameliorated with capacitors or inductors? Or it might run into impracticably large values required? Another forum post points me to "single SCR in a phase-controlled half wave topology". What would be the best option? Please point me to a good direction. \$\begingroup\$ You could use a stepdown transformer of 220 to 40V(42V). Being 400VA. Connect the primary of the transformer directly to the mains and place the secondary winding in series with the mains in such a way that the voltage becomes 180V AC. After rectification of this voltage you have what you need for your motors. \$\endgroup\$ Exactly as depicted in winny's comment. You don't "Step down" 220 VAC to 180 VDC. 220 VAC Single Phase is a normal supply for a DC drive to deliver 180VDC output. Using a drive, you will also get the benefits if an acceleration and deceleration ramp, current limiting (to protect the motor), and a simple variable speed control (a potentiometer). If you are just going to run the motor directly off the line, a simple bridge rectifier would work, but will probably blow up due to the inrush current to s...

Generally, electronic products have a step-down transformer that enables the DC power supply to convert AC mains voltages to a DC voltage (often small). The process involves converting a higher AC to lower AC, then to a low voltage DC, using a What is a Transformerless Power Supply? As the name suggests, a transformerless power supply circuit uses no inductor or transformer when providing a low DC from the mains’ high voltage Alternating Current. It works by making a high voltage capacitor drop the AC primary current (120V or 230V) to a low current level (12V, 5V, or 3V). The lower level is suitable because it ensures optimum functioning for the connected load or electronic circuit. Thus, you should get the transformerless power supply for the circuitry when using an electric circuit that requires low currents (like a few milliamperes) or in microprocessor circuits. The transformerless circuit has a working principle that involves inrush limiting, supply voltage division, regulation, and rectification – to be discussed in the power supply structure. Transformerless Power Supply Advantages and Disadvantages As with any other technological equipment, the transformerless power supply has its advantages and disadvantages. Advantages • First, it is cheap. • Then, it requires less space hence making it less bulky, as opposed to a transformer-based application which is chaotic and weighty. • Also, you can use it in low-powered electronic components. Disadvantages • First, excess ...

Given data: V p= 220 V, P s= 88 W, V s= 11 V Transformation ratio K = `"V"_"s"/"V"_"p"` K = `11/220 = 1/20 = 1 : 20 = 1/20` Current in the primary I p = ? `"P"_"S" = "V"_"S" "I"_"S"` `"I"_"S" = "P"_"S"/"V"_"S" = 88/11` = 8 A `therefore "I"_"p"/"I"_"S" = "K"` `"I"_"p" = "KI"_"S"` `therefore "I"_"p" = 1/20 xx 8 = 2/5 = 0.4` I p = 0.4 A