Based on ON Semiconductor's 4KW 650V industrial motor drive solution

WPG Holdings, a leading semiconductor component distributor dedicated to the Asia-Pacific market, announced that its subsidiary WPI has launched a 4KW 650V industrial motor drive solution based on ON Semiconductor's NFAM5065L4B intelligent power integration module (IPM).

Figure 1- Display board of WPG's 4KW 650V industrial motor drive solution based on Onsemi products

In recent years, with the rapid development of science and technology and the accelerated advancement of Industry 4.0, the demand for motors in the industrial market has been increasing day by day. According to surveys by relevant institutions, the power consumption of motors is about 50% of the global power supply. This is an urgent problem to be solved under the unified strategic goal of energy conservation and emission reduction and achieving "double carbon". In order to improve the operating efficiency of motors and reduce energy loss, WPG World Peace has launched a 4KW 650V industrial motor drive solution based on Onsemi products. This solution provides an ideal choice for designing high-efficiency and low-power industrial motor drives.

The NFAM5065L4B intelligent power module used in this solution provides a full-featured, high-performance inverter output platform for AC induction, DC brushless and permanent magnet synchronous motors. Its fully integrated inverter power module consists of an independent high-side gate driver, LVIC, 6 IGBTs and a temperature sensor (VTS or thermistor (T)). The 6 IGBTs are configured in a three-phase bridge configuration with independent emitter connection pins in the lower section. This design has greater flexibility in selecting control algorithms. And its built-in high-speed HVIC only requires a single power supply voltage and converts the incoming logic level gate input into a high-voltage, high-current drive signal so that it can properly drive the module's built-in IGBT.

Figure 3-Block diagram of WPG's 4KW 650V industrial motor drive solution based on Onsemi products. In addition, this solution also uses Onsemi's DC-DC converter, auxiliary power PWM IC, OPA & LDO and other components, with current detection circuit and circuit protection functions, which can accelerate engineers' research and development of motor drivers with high efficiency and low power consumption. Core technology advantages:

NFAM5065L4B Intelligent Power Module (IPM) Inverter Technology:

The NFAM5065L4B IPM module is a fully integrated power stage for three-phase motor drivers, including six IGBT drivers with reverse diodes, independent high-side Hi-Side gates, LVICs, and temperature sensors (VTS). The three-phase three-arm IGBTs are configured with independent emitter connection pins on the lower arm to facilitate R&D engineers to design current detection circuits.

Protection Function (ProtecTION Function):

The protection functions in the system include: UVP Lock-out, which provides 21A over-current protection through an external comparator (OPA) circuit. R&D engineers can adjust the over-current protection point through external resistor divider, and finally notify the MCU to trigger the protection through the CIN pin.

High-efficiency auxiliary power supply and DC-DC converter:

In this development board, the DC-Link is provided by an external power supply, and the NCP1063 PWM IC forms a high-efficiency auxiliary power supply to provide 15Vdc voltage for IPM operation. In addition, the 5Vdc and 3.3Vdc voltages required by the operational amplifier and over-current protection comparator are provided by the FAN8303 DC-DC conversion IC and NCP718 LDO.

Current detection circuit:

Onsemi NCS2250 high-speed comparator and NCS20166 high-precision low-offset operational amplifier are combined with NCD98011 UCB ADC analog-to-digital conversion module to provide an overall resolution of 0.016A/bit and a phase current detection range of ±16.5A.

Program Specifications:

Input voltage: 200V-400Vdc (maximum allowable 410Vdc);

Output power: 1KW (continuous operation mode) or 4KW (up to 15 minutes operation time) (room temperature Ta = +25°C);

Output current: ±2.5Arms /1KW (IPM single arm);

Efficiency: 95% (1KW), 96.2% (4KW).