IPM (Intelligent Power Module), intelligent power module that is not only the power switching device and driver circuit integrated together. But also integrated over-voltage, over-current and over-temperature fault detection circuit, and the detection signal is sent to the CPU. It consists of the die and the optimization of high-speed low-power gate driver circuit and fast protection circuit. Even in the event of accidents or improper use of the load to be guaranteed IPM itself from damage. IPM IGBT is generally used as an integrated structure of a power switching element, integrated current sensor and the drive circuit. IPM for its high reliability, ease of use to win more big market, especially for the drive inverter and a variety of inverter motor is frequency control, metallurgical machinery, electric traction, servo drives, frequency appliances of a species ideal power electronic devices.
Feature
IPM and conventional components IGBT module and drive circuit has the following advantages:
(1) containing the drive circuit. IGBT sets the optimum driving condition, the distance between the IGBT drive circuit is very short, low impedance output, and therefore, does not require a reverse biased. Power required for the next leg 1 group on leg three groups, a total of four groups.
(2) includes over-current protection (OC), short-circuit protection (SC). Because it is protected by the realization detect the IGBT collector current, so no matter what IGBT abnormal, can be protected, especially the lower arm short-circuit and short circuit protection to ground.
(3) containing the drivers, supply undervoltage protection (UV). Each driver circuit has UV protection. When the drive power supply voltage UCC UV than a predetermined value is generated when undervoltage protection.
(4) includes thermal protection (OH). OH prevent IGBT, FRD (fast recovery diode) overheating protection. No temperature sensing element on an insulating substrate inside the IPM detects the insulating substrate temperature Tcoh (IGBT, FRD chip protection time after abnormal heat more slowly). R-IPM further with a temperature sensing element in the IGBT chip features, the abnormal heat generation of the chip can achieve high speed OH protection.
(5) containing the alarm output (ALM). ALM is a function of the external output fault alarm when the OH and the lower, or UV, through the control of the microcomputer outputs an abnormal signal IPM, can effectively stop the system.
(6) includes a brake circuit. And inverter bridge as containing IGBT, FRD, drivers can easily achieve dynamic braking via external brake resistor.