What is wire insulation resistance

Wire insulation resistance in the dielectric, if the electric field intensity is too large, the bound charge in the dielectric into free charge and electrical conduction, discharge phenomenon. If the voltage between the capacitor two plates is too high, the dielectric between the plates will break down. Insulation resistance: is a physical quantity to measure the insulation performance of the medium, it is numerically equal to the resistance value of the medium, the unit is megohm.

Discharge resistors are resistors used to discharge electricity. Discharge resistors are usually in parallel with capacitors.

When the power supply fluctuates, the capacitor will charge and discharge accordingly. If the discharge resistance is not parallel, the charge-discharge current starts from one end of the capacitor and returns to the other end of the capacitor through the working loop, which seriously interferes with the stable operation of the circuit. Parallel discharge resistor, charge and discharge current flow through the resistor, can avoid the above disadvantages.

When the motor or other inductive load driven by the frequency converter is stopped, it is generally achieved by energy consumption braking, that is, the kinetic energy of the motor and the magnetic energy inside the coil are consumed by a other energy dissipating component, so as to achieve rapid stop. When the power supply stops, the inverter circuit of the converter will reverse the guide, and the remaining electric energy will be fed back to the DC bus of the converter. The voltage on the DC bus will therefore rise. When it rises to a certain value, the brake resistance of the converter will be put into operation, so that this part of the electric energy is consumed through the resistance heating, and the voltage on the DC bus is maintained as a normal value.