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Solar-Powered Water Pump Controller

Solar-Powered Water Pump Controller

It is a CY8C27443-based Solar Pump Controller that operates a submersible water pump directly from solar panels. It is ideal for remote areas that lack conventional power supplies. The powerful PSoC provides three-phase PWM generation, signal conditioning, temperature monitoring, constant voltage-to-frequency control, and over-current and fault protection.
Solar-powered pumps are used to extract ground water in remote areas where conventional power may not be readily available. The low-cost submersible pumps operate from three-phase power, so the DC power from the solar panel must be converted to AC with an inverter. PRINCIPLE PARTS

The solar pump controller consists of three principle blocks: the inverter waveform generator, the analog signal acquisition, and the over-current detector. The elements that make up these blocks consist of hardware and software components in the CY8C27443.



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The inverter waveform generator is responsible for directly controlling the inverter power stage’s switching action. It does this using three H-Bridge MOSFET switches (one set for each phase). The switches are modulated at the switching frequency by way of the CY8C27443’s pulse-width modulator blocks. Additionally, the internal dead-band generator times the break-before-make interval on the H-Bridge. This delay is required to allow the switch time to turn off before the complementary H-Bridge switch is turned on. Three of the PWMDB8 blocks are used (one for each phase). The top and bottom switches are connected to phase 1 and phase 2, respectively.

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