FOC Vector Control
Field Oriented Control (FOC) is our core motor drive algorithm used across all BLDC and PMSM products. It decomposes the stator current into independent torque and flux vectors, enabling precise, smooth motor control equivalent to a DC machine.
Our SVPWM implementation improves bus voltage utilisation by 1.15× compared to conventional SPWM, directly reducing inverter size and cost. Automatic weak-field control entry and exit allows compressors and fans to operate well beyond their rated base speed.
- 1.15× bus voltage utilisation vs SPWM — smaller capacitors, lower cost
- Automatic weak-field injection on demand — no manual tuning required
- Single-resistor phase current sampling — minimal BOM, compact PCB
- Sensorless back-EMF and Hall-sensor modes in one firmware platform
- Applied in AC compressors, refrigerators, ceiling fans and HVLS drives
Advanced MPPT Algorithm
Our Maximum Power Point Tracking algorithm uses perturb-and-observe with adaptive step-size hill-climbing to continuously extract maximum power from the PV array across the full I-V curve — regardless of temperature, irradiance level or partial shading conditions.
Rapid convergence to the global MPP after transient events (cloud shadows, load changes) is achieved within 2 seconds. Hybrid PV plus grid or diesel generator switching is seamless and uninterrupted.
- Greater than 99.5% MPPT tracking efficiency — verified on motor dyno with PV simulator
- Recovers global MPP within 2 s after partial shading transients
- Seamless source switching: PV → grid → diesel — zero pump downtime
- 60–450 Vdc PV input range covers 2–18 panels in series
- Pipe-filling soft-start prevents water hammer on pump start-up
IoT & Smart Connectivity
Every IPS product platform supports embedded IoT connectivity as a factory option. Wi-Fi and BLE 5.0 stacks enable smart home integration for residential products. Industrial HVLS fans use BACnet IP or Modbus RTU for native building management system integration.
OTA (over-the-air) firmware update capability means your products can receive new features, bug fixes and performance improvements remotely — reducing service call costs.
- Wi-Fi 802.11 b/g/n and BLE 5.0 dual-mode embedded stack
- BACnet IP and Modbus RTU for HVLS fan BMS integration
- RS485 and GPRS telemetry for solar pump remote monitoring
- OTA firmware update — field upgrades without physical access
- MQTT broker integration for cloud dashboard and data logging
Acoustic Optimisation
Motor noise is one of the biggest quality complaints in residential HVAC and fan products. Our proprietary asymmetric PWM carrier frequency spreading technique redistributes harmonic energy away from audible frequencies, reducing perceived motor noise by up to 12 dB.
Adaptive dead-time compensation eliminates current distortion at low speeds — the main cause of low-frequency hum in fan motors. The result is near-silent operation that premium brands demand.
- Up to 12 dB reduction in audible harmonic noise vs conventional PWM
- Asymmetric carrier frequency spreading — no discrete tonal peaks
- Adaptive dead-time compensation eliminates low-speed current distortion
- EMI pre-compliance: reduced conducted and radiated emissions
- Applied in ceiling fans, AC indoor units and refrigerator compressors
Multi-Layer Protection
Every IPS controller implements both hardware and firmware protection layers that operate independently, ensuring fault isolation even if the MCU is compromised. This defence-in-depth approach guarantees motor and system safety under all abnormal conditions.
- Hardware over-current trip: independent of MCU firmware
- Over-voltage and under-voltage lockout with hysteresis
- Thermal model + NTC sensor dual-channel over-temperature shutdown
- Phase-loss detection and locked-rotor protection with auto-restart
- Dry-run and low-water-level protection for solar pump applications
- Configurable auto-restart: 3 attempts with increasing delay intervals
Power Management
Our AC-input inverter platforms incorporate active Power Factor Correction (PFC) achieving greater than 0.98 PF, meeting IEC 61000-3-2 harmonic limits for Class A equipment. This eliminates the need for customers to add external PFC stages.
Intelligent bus voltage regulation, soft-start ramps and regenerative braking ensure smooth operation and minimal mechanical stress on motors, fans and compressors throughout their service life.
- Active PFC >0.98 — meets IEC 61000-3-2 Class A limits
- Configurable soft-start ramps: 0.5 s to 30 s ramp time
- Regenerative braking energy recovery for large fan applications
- Standby power below 0.5 W for all residential products
- Wide input: 85–265 Vac single-phase, 200–480 Vac three-phase