PWM Driver
DELTROL's Pick and Hold module is designed to apply an initial full supply voltage to the coil for 250 mS and than drop the voltage to a pre-determined level through Pulse Width Modulation to avoid overheating the solenoid or valve coil. This provides a significant increase in initial pull in force for the solenoid or valve coil while maintaining the continuous duty rating without over heating of the coil.
Three different PWM values are available, these are factory preset. The output voltage for each duty cycle is listed below in Chart 1 for various supply voltages.
The module is a line mounted device with standard 6" long lead wires for connection the power supply and solenoid or valve coil.
Output Voltage for Duty Cycle
| Min | Typ | Max | Units | |
|---|---|---|---|---|
| Supply VDC | 12 | -- | 48 | VDC |
| Supply Volt Ripple | -- | -- | 1% | VDC |
| Pick Current | -- | -- | 10 | A |
| Hold Current (RMS) | -- | -- | 3.8 | A |
| Operating Temp | -40 | -- | 85 | Deg C |
| Storage Temp | -55 | -- | 175 | Deg C |
| PWM Frequency | 300 | 320 | 500 | Hz |
| Pick Time | 200 | 250 | 300 | mS |
| Repetition Rate | 1x/s | 1x/s | 1x/s | 1x/s |
| Mounting Position | Unrestricted | Unrestricted | Unrestricted | Unrestricted |
| Supply VDC | Output 10% PWM | Output 25% PWM | Output 50% PWM |
|---|---|---|---|
| 12 VDC | 3.8 VDC | 6.0 VDC | 8.5 VDC |
| 18 VDC | 5.7 VDC | 9.0 VDC | 12.7 VDC |
| 24 VDC | 7.6 VDC | 12.0 VDC | 17.0 VDC |
| 36 VDC | 11.4 VDC | 18.0 VDC | 25.5 VDC |
| 48 VDC | 18.2 VDC | 24.0 VDC | 33.9 VDC |
Output Voltages for other Supply voltages can be calculated per the following:
- For 10% PWM Duty Cycle - Multiply the Supply voltage by 0.316
- For 25% PWM Duty Cycle - Multiply the Supply voltage by 0.500
- For 50% PWM Duty Cycle - Multiply the Supply voltage by 0.707
Deltrol's PWM module product will be available for sale in Q4 2017. Feel free to contact Deltrol to discuss your particular application, or to get advance samples for evaluation.
Specifications subject to change without notice.