Medical Equipment Motor 12V 4200-8820RPM For Urine Analyzer Go-Gold

Performance Specifications

Essential Details

Model Number: KG-1626DC12

Rated Voltage: 12V

Rated Speed: 4200-8820RPM

Continuous Current: 0.04-0.22A

Place of Origin: Guangdong, China

Type: Brush DC Motor

Application: Medical Equipment

Rated Torque: 2(mNm)

Application: Urine Analyzer

Lead Time

Drawings

Motor Picture

Application

Brush DC Motor Introduction

A brush DC motor is an internally commutated electric motor designed to be run from a direct current power source and utilizing an electric brush for contact.

Brush motors were the first commercially important application of electric power to driving mechanical energy, and DC distribution systems were used for more than 100 years to operate motors in commercial and industrial buildings. Brushed DC motors can be varied in speed by changing the operating voltage or the strength of the magnetic field. Depending on the connections of the field to the power supply, the speed and torque characteristics of a brushed motor can be altered to provide steady speed or speed inversely proportional to the mechanical load. Brushed motors continue to be used for electrical propulsion, cranes, paper machines and steel rolling mills. Since the brushes wear down and require replacement, brushless DC motors using power electronic devices have displaced brushed motors from many applications.

DC motors use wound coils of wire to create a magnetic field. In a brushed motor, these coils are free to rotate to drive a shaft – they are the part of the motor that’s called the “rotor”. Usually the coils are wound around an iron core, though there are also brushed motors that are “coreless”, where the winding is self-supported.

The fixed part of the motor is called the “stator”. Permanent magnets are used to provide a stationary magnetic field. Normally these magnets are positioned on the inner surface of the stator, outside of the rotor.

In order to create torque, which makes the rotor spin, the magnetic field of the rotor needs to continuously rotate, so that it’s field attracts and repels the fixed field of the stator. To make the field rotate, a sliding electrical switch is used. The switch consists of the commutator, which is typically a segmented contact mounted to the rotor, and fixed brushes which are mounted to the stator.

Brush DC Motors Work

Brush DC motors have wound coils in the rotor, which are surrounded by magnets contained in the stator. The two ends of a coil are connected to the commutator. The commutator in turn connects to electrodes called brushes, resulting in the flow of direct current electric power through the brushes and coil for as long as the brushes and commutator are in contact.

As the coil rotates, however, it reaches a position where the brushes and commutator are no longer in contact, halting current flow in the coil. Despite this, the momentum of the coil causes it to continue rotating. This brings the brushes and commutator back into contact, restoring the current that now flows through a different coil.

This repeated switching of current flow causes the brushed DC motor to continue rotating. Brushed DC motors operate on direct current, and their speed can be easily controlled by altering the applied voltage.