Design and build regulated SMPS HV PSU (quasi two quadrant HV amplifier) - 12/12/2023 18:03 EST
Budget: €20 – €30 EUR
Looking for engineer skilled in power electronics for design and testing of the regulated SMPS HV PSU with DC and DC+AC high impedance output (sine wave in first two quadrants).
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Please note that during realization of the project no high voltage measurement equipment or probes are required. The output of the device contains HV metal film resistive divider which shall be calibrated by measuring voltages manageable with standard equipment.
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In essence, the device is a (quasi) two quadrant 1:3000 HV amplifier with its first quadrant realized with HV flyback and the second quadrant realized with passive resistive sink.
Technical requirements are as following:
- Input power supply: 24 V DC (isolated, possible used of pre-existing modules)
- Output voltage: single polarity 100 – 10000 V DC + added AC sine component 0 – 500 V (1 – 1000 Hz)
- Output current: 10 - 1000 uA (depending on the connected capacitive load)
- Type of load: capacitive (100 – 1000 pF)
- Single analogue input for control of output voltage amplitude (sine) by external analog signal (0 - 3.3V)
- Single logic input for turn on/off of the PSU
- One analogue output for output voltage measurement (0 – 3.3 V)
- One analogue output for low side output current measurement (0 – 3.3 V)
Current state of the project:
A few possible technical solutions and topologies were inquired to ascertain their pros/cons so we can have a starting point for discussion prior to commencement of the project.
Most of the schematic (precise PWM regulation, resistive output section, measurements, safeties) is already entirely simulated in PSpice (Micro-Cap) and components are already selected. The test PCB is designed half way (Altium). The design is a starting point and can be modified later if required.
What needs to be done:
1. Calculate and possibly simulate magnetics i.e. ferrite transformer (flyback) based on commonly available cores (Mouser, Digikey, TME etc.) or source already commonly available transformers.
2. Make the prototype transformer (can be hand made rough prototype) for testing and optimization purposes.
3. Make physical test circuitry for test and troubleshooting.
4. Integrate parts of the circuit and test/troubleshoot it (possible need to add and optimize fedback compensation)
5. Design final PCB (once the prototyping is successfully finished) and produce one physical test device for further testing and integration purposes.
***
More detailed description, block schematic and simulation files (Micro-Cap 12) will be provided during the initial discussion at which point we may agree on necessary budget.
***
Please note that during realization of the project no high voltage measurement equipment or probes are required. The output of the device contains HV metal film resistive divider which shall be calibrated by measuring voltages manageable with standard equipment.
***
In essence, the device is a (quasi) two quadrant 1:3000 HV amplifier with its first quadrant realized with HV flyback and the second quadrant realized with passive resistive sink.
Technical requirements are as following:
- Input power supply: 24 V DC (isolated, possible used of pre-existing modules)
- Output voltage: single polarity 100 – 10000 V DC + added AC sine component 0 – 500 V (1 – 1000 Hz)
- Output current: 10 - 1000 uA (depending on the connected capacitive load)
- Type of load: capacitive (100 – 1000 pF)
- Single analogue input for control of output voltage amplitude (sine) by external analog signal (0 - 3.3V)
- Single logic input for turn on/off of the PSU
- One analogue output for output voltage measurement (0 – 3.3 V)
- One analogue output for low side output current measurement (0 – 3.3 V)
Current state of the project:
A few possible technical solutions and topologies were inquired to ascertain their pros/cons so we can have a starting point for discussion prior to commencement of the project.
Most of the schematic (precise PWM regulation, resistive output section, measurements, safeties) is already entirely simulated in PSpice (Micro-Cap) and components are already selected. The test PCB is designed half way (Altium). The design is a starting point and can be modified later if required.
What needs to be done:
1. Calculate and possibly simulate magnetics i.e. ferrite transformer (flyback) based on commonly available cores (Mouser, Digikey, TME etc.) or source already commonly available transformers.
2. Make the prototype transformer (can be hand made rough prototype) for testing and optimization purposes.
3. Make physical test circuitry for test and troubleshooting.
4. Integrate parts of the circuit and test/troubleshoot it (possible need to add and optimize fedback compensation)
5. Design final PCB (once the prototyping is successfully finished) and produce one physical test device for further testing and integration purposes.
***
More detailed description, block schematic and simulation files (Micro-Cap 12) will be provided during the initial discussion at which point we may agree on necessary budget.