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  1. ron simpson

    DC Converters: Inductors and Capacitors

    A capacitor is much like a water storage tank. A conductor is something a pipe. Electrons flow in a conductor. Water flows in pipe. Not exactly the same. Just like a pipe can fill a storage tank it can also empty the tank. I do not know which you are talking about. A inductor is more like...
  2. ron simpson

    Buck or Boost?

    Can you rewire the panel to get twice the voltage and half the current?
  3. ron simpson

    Automatic Switching with Power Supplies. Looking for Guidance.

    Are your power sources AC or DC? What voltage, current, watts?
  4. ron simpson

    Switching to Higher Current w/ MOSFET

    Why do you need a higher Voltage Gate to Source? Please share your schematic.
  5. ron simpson

    2kW Step-down PWM converter for high voltage dc-BUS

    What is the load? Does it need to be isolated, probably not. You have two wires "320V & 0V". Does the output need to be "Vout and 0V" where 0V is common or can it be "320V and Vout" where the 320V wire is common. Strange question, but it answers the question of top side switch verses bottom...
  6. ron simpson

    Voltage Divider Cooling. Needing heat help.

    We do not know enough bout the voltage divider. No data on the motor. Think about the power going into the motor. The power in the resistors is 33% of that. See how large the motor is and how small the resistor are. Yes they will get hot.
  7. ron simpson

    Switching Higher Current -- MOSFET

    Real question is Why? +/-20V is common, I can find several examples of +/-40V. Some of the new transistors have a very low voltage G-S rating.
  8. ron simpson

    DC Motor controller

    I have not used this part but it looks simple. (uses a p-fet) But it looks like it would take 60 to 70V and buck it down to run the motor. It the running current is 10A you probably need a 20 to 30A supply. That might be too much for a p-MOSFET. Here is another higher current option...
  9. ron simpson

    DC Motor controller

    Make a 60V to 0-50V 10 or 20A buck. You probably can't really make a 0-50V so 0% duty cycle = 0V, and make the supply stable from 5-50V. Is the 10A normal running current with a stall current of 30A? or is the stall current 10A?
  10. ron simpson

    How do transient currents affect electrical equipment types?

    Your car is insulated from ground by tires and a foot of air gap. Here is a video of mega volt power line and a helicopter. HV power line
  11. ron simpson

    Power Converter Design: Wide Input

    This project will be very hard. 400V at 7.5A to 20V at 150A You must use parts for 400V and 150A. The transistors are for a 60kw supply. I think the efficiency will suffer and the price will not be good.
  12. ron simpson

    Pulse Width Modulation Sinewave

    Do I understand? You have a 3 phase inverter. You have a 1 phase control panel. Is that right?
  13. ron simpson

    Efficiency of DC/DC System

    ZXGD3107N8 Might be this part. I used two with a center tapped transformer. 250khz.
  14. ron simpson

    Efficiency of DC/DC System

    OK so several types of resonant converters will not work, because it need to work at 300 to 400khz. Use a older style forward, half bridge type PWM. Hard switching at 400khz will cause some heat problems in the MOSFETs. Look at SiC and GaN MOSFETs, they are faster. Last time I used MOSFETs...
  15. ron simpson

    Efficiency of DC/DC System

    Here is a interesting part. UCC25640x LLC Resonant Controller I would think about half bridge, because it reduces the voltages on the transformer to 1/2 right away compared to full bridge or most types. Here is a design onsemi it is about the right size but too complicated. There are some good...
  16. ron simpson

    Efficiency of DC/DC System

    Do you need isolation from 200-350vdc to 5Vdc?
  17. ron simpson

    Power Supply for LEDs

    Are you using 12 x 10 LEDs on your board? What about heat. How are you removing 8 watts of heat? Enclosure?
  18. ron simpson

    DC Motor controller

    Do you need to brake the motor? Do you need to reverse the motor?
  19. ron simpson

    DC Motor controller

    I see many options. >Build a 230vac to (0-50V dc 10A) power supply. or >Get a 230vac to 50V supply and add a 50V 10A motor controller. (make two small projects)
  20. ron simpson

    Short Circuits and Overload Protection

    Power supplies have a control loop that looks at the output voltage. If the voltage is not right then the supply changes something to increase/decrease the voltage to make it right. Something = duty cycle, phase, frequency, on time, ..... many different ways and many different type of...
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