commutate
Học thuậtThân thiện
Definition
Verb: 1. To reverse the direction of (an alternating electric current) each half cycle to produce a direct current: This is a technical term from electrical engineering. It describes the fundamental process within a device called a commutator, which converts alternating current (AC) into direct current (DC).
Usage and Examples
- Technical Process: The core function is to periodically reverse the current's direction.
- The brushes and segments on the motor's armature commutate the current to maintain rotation in one direction.
- A rectifier circuit uses diodes to commutate the AC input from the wall outlet into DC power for the device.
- Device Function: Often describes what a component (a commutator) does.
- The primary role of the mechanical commutator is to commutate the current flowing through the rotor windings.
Advanced Usage
- Commutation (n.): The noun form refers to the process or act of commutating.
- Sparkless commutation is a key design goal for efficient DC motors.
- Commutation Failure: A technical fault where the process does not occur correctly.
- The motor overheated due to a commutation failure caused by worn brushes.
Variants and Related Words
- Commutator (n.): A mechanical or electronic device that performs the function of commutation, typically found in DC motors and generators.
- Commutated (adj.): Describes a current that has undergone commutation.
- The commutated current is now suitable for charging the battery.
Synonyms
- Rectify: In electrical engineering, this is a close synonym, especially when referring to the conversion of AC to DC. However, "rectify" often implies the use of solid-state components (like diodes), while "commutate" can imply a mechanical process.
- Diodes rectify alternating current. (Electronic method)
- A commutator commutates alternating current. (Often mechanical method)
Verb
- reverse the direction of (an alternating electric current) each half cycle so as to produce a unidirectional current