Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

When the load of induction motor increases, the rotor current changes. The working principle of an induction motor is based on the interaction between the rotating magnetic field generated by the stator windings and the induced current in the rotor windings. The following explains how the rotor current changes as the load increases:How it works when the load increases Load increase: When the load of the induction motor increases, it means that the motor needs to do more work to overcome greater

The maximum number of coil groups in a three-phase motor can be determined by considering the relationship between the number of poles, phases, and slot positions in the motor. Here's how to calculate it:Pole and Slot Count: In a three-phase motor, the slot count is usually a multiple of 3 because each phase has its own coil group evenly distributed around the stator. The relationship between the slot count (S) and the pole count (P) is directly related through the three-phase winding mode: S =

An induction motor is called a "rotating transformer" due to its fundamental operating principle, which closely resembles that of a conventional transformer. Both induction motors and transformers rely on electromagnetic induction to transfer energy between their components, but they differ in the physical arrangement and application. Principle of Operation: In an induction motor, the stator windings create a rotating magnetic field. This field, when it interacts with the rotor windings, induces

Synchronous motors and induction motors (also known as asynchronous motors) are two common types of AC motors, which have their own characteristics and are suitable for different application scenarios. The following are detailed descriptions of the most suitable application areas for synchronous and induction motors:Synchronous motorPeculiarity Constant speed: When the synchronous motor is operating under rated load, its speed is proportional to the frequency of the grid, so it can maintain a co

The Stator's role in a jet engine is to increase air pressure and help improve the direction and stability of the air flow. The stator, usually located in the compressor part of the engine, is a ring structure consisting of a series of stationary blades. Here's a detailed explanation of how stators increase air pressure in jet engines:Working principle What the compressor blades do: In a jet engine, the rotor blades rotate to compress the air entering the engine, thereby increasing the pressure

Gear pump is a pump that relies on one or more pairs of meshing gears to rotate to transport fluid. Gear pumps are usually used to transport viscous fluids, such as lubricating oil, hydraulic oil, polymer solutions, etc. As for whether the gear pump can drive a separate motor, this is actually a reverse problem, because normally, the motor drives the gear pump, rather than the gear pump drives the motor. Let's explore in detail:Working principle of gear pumpGear pump is mainly composed of a pair

In a Star-Delta or Y-delta connection, changing the direction of the motor can be achieved by changing the phase sequence applied to the motor windings. The direction of the motor depends on the power supply phase sequence, that is, the order in which the three phases of the power supply reach the motor winding. The following are the specific operation steps and principles:Star connection (Star/Y connection)Star connection principle: In a star connection, one end of the three windings is connect

Squirrel-cage induction motors (also known as squirrel-cage motors) are one of the most commonly used motor types in industry. When starting up, the characteristics of the squirrel cage motor are mainly determined by its starting current and starting torque.Starting currentStarting current refers to the current flowing through the motor when the motor is just switched on and starts to rotate. Since the speed of the motor is zero at this time, there is no back EMF generated, so the starting curre

Creepage in squirrel cage motors refers to the phenomenon where the rotor begins to rotate even though the motor is not receiving sufficient voltage to fully start or maintain rotation. This can happen under certain conditions, particularly when there is residual magnetism or when the motor is subjected to external forces that cause it to turn slightly. Here are the main causes of creepage in squirrel cage motors:Residual Magnetism Magnetic Fields: Even after the power supply is cut off, some re

The slip ring and brush in the induction motor are mainly used in the winding rotor induction motor, rather than the cage induction motor. In the winding rotor induction motor, the use and function of the slip ring and brush mainly include the following aspects:Slip ringThe slip ring is a metal ring fixed to the motor shaft, usually made of copper. The number of slip rings depends on the design of the motor and is generally the same as the number of phases in the rotor windings. The main functio