At AIP, we focus on global motor testing. The armature tester is one of our motor test equipment. If you want to test the armature well, you need to understand the armature. The word "armature" was first used for an inductance, the holder of a magnet, in the mid-19th century.
Ⅰ. What is an armature?
An armature is a component of an electrical machine (i.e., a motor or generator) that carries alternating current (AC). Even on a direct current (DC) motor, the armature can conduct alternating current either through a commutator (which periodically reverses the direction of current flow) or through electronic commutation (as in brushless DC motors, for example).
The armature provides support and housing for the armature windings, which interact with the magnetic field formed in the air gap between the stator and rotor. The stator can be a rotating part (rotor) or a stationary part (stator).
Ⅱ.How an Armature Works
How does the armature in a motor work?
Electric motors use the principle of electromagnetic induction to convert electrical energy into mechanical energy. When a current-carrying conductor is placed in a magnetic field, it experiences a force according to Fleming's left-hand rule.
In an electric motor, the stator generates a rotating magnetic field by using permanent magnets or electromagnets. The armature is usually the rotor with armature windings connected to the commutator and brushes. The commutator switches the direction of the current in the armature windings as it rotates so that it is always aligned with the magnetic field.
The interaction between the magnetic field and the armature windings creates a torque that causes the armature to rotate. A shaft connected to an armature transmits mechanical power to other devices.
How the Armature in a Generator Works
Generators use the principle of electromagnetic induction to convert mechanical energy into electrical energy. When a conductor moves through a magnetic field, it induces an electromotive force (EMF) according to Faraday's law.
In a generator, the armature is usually the rotor driven by a prime mover such as a diesel engine or a turbine. The armature has armature windings connected to the commutator and brushes. The stator utilizes permanent magnets or electromagnets to generate a fixed magnetic field.
The relative motion between the magnetic field and the armature winding induces an electromotive force in the armature winding, which drives current through an external circuit. The commutator switches the direction of current in the armature windings as it rotates, creating alternating current (AC).
Ⅲ.There are many uses of the armature:
① Main function: It is to conduct current on the magnetic field, thereby generating shaft torque in the active machine.
②Secondary role: to generate electromotive force (EMF).
In addition, armatures can be used for both stationary and rotating components.
The armature structure consists of several components including the core, windings, commutator and shaft.
|The armature core carries the motor's rotating parts and magnetic field. The armature core is usually made of laminated silicon steel sheets. This material has good magnetic permeability and can greatly improve the efficiency of the motor.
|The armature winding is the coil wound on the armature, usually composed of several coils wound on the armature core. The armature winding carries the current and is also the source of the armature's magnetic field.
|The commutator controls the direction of the current flow to the armature so that the motor runs smoothly. Usually, the commutator consists of a set of copper plates or carbon brushes, which change the direction of the current flow in the armature winding by contacting the armature winding.
|Rigid rod that supports and rotates the armature core and commutator, which transmits mechanical power from the prime mover to the load equipment.
For generators, it is the component that generates electromotive force, such as the rotor (rotating electrical component) in a DC generator, and the stator (stationary electrical component) in an alternator; for a motor, it is the component that generates electromagnetic force Components, such as the rotor in a DC motor, monitor current flow.
Armatures are used in a wide range of fields, such as power tool motors, garden tool motors, vacuum cleaner motors, small household appliance motors, automotive motors, fitness equipment motors, permanent magnet motors, etc.
All AIP motor testing equipment is made in China, we can customize the production of motor testers for you according to your needs, Please contact us immediately Tel/Whatsapp:+86-13969776659, E-mail: firstname.lastname@example.org, to discuss your armature test needs, we will provide you with a customized armature test plan and solve your armature test problems.