To understand the difference between
electronic relays and electromagnetic relays, we must first understand them.
Knowing exactly where they are used makes it easier to judge.
Homepage Let me know about electronic
relays. Its full name is electronic relays. It is an electronic control device.
It has a control system (also known as an input loop) and a controlled system
(also known as an output loop). It is commonly used in automatic control. In
the circuit, it is actually an "automatic switch" that uses a smaller
current to control a larger current. Therefore, it plays the role of conversion
circuit, safety protection, automatic adjustment and so on in the circuit.
Let me focus on the electromagnetic relay.
The electromagnetic relay is also an electronic control device. It has a
control system (also known as an input loop) and a controlled system (also
known as an output loop). It is commonly used in automatic control circuits. It
is also an "automatic switch" that uses a smaller current and a lower
voltage to control a larger current and a higher voltage. Therefore, it plays
the role of conversion circuit, safety protection, automatic adjustment and so
on in the circuit. By recognizing these two relays, it is not difficult to see
that their functions and methods are the same. So what are the differences
Electronic relays use electronic switches
(such as transistors, triacs) as the main switching element. This allows the
relay to control larger circuits. Other types of electronic relays (transmitting
by means of optics, frequency modulation, or capacitive effects, etc.) include
optocouplers (on the main side, light-emitting diodes transmit the light
signal, while phototransistors act as receivers and control switching
elements), thermoelectric relays ( The main input energy heats the bimetal
parts, mechanically drives the contacts) and piezoelectric relays
(piezoelectric effect mechanically operates the contacts). Electromagnetic
relays are widely used in aviation, aerospace, ships, home appliances and other
fields. They mainly complete functions such as signal transmission, execution
control, and system power distribution. They are one of the key electronic
components in each system.
We can classify electromagnetic relays
according to the nature of the intermediate signal between the main terminal
and the switching element. The magnetic field generated by the input signal
acts on the mechanical contacts. Examples include standard yoke type relays and
reed relays. This standard yoke type relay consists of a coil, armature and one
or more sets of contacts wound on a soft iron core. When current is applied,
the coil generates an electromagnetic field and the armature is activated. The
armature is the moving part of the relay. It is hinged on a yoke, mechanically
connected to the moving contacts, opens and closes the contacts, and has an
additional spring that returns it to its original position. The armature is
held in place by a spring, so when the relay is de-energized, there is a gap in
the magnetic circuit. While all versions offer the same basic operating
concept, electrical relays use slightly different technologies and come in a
wide variety of sizes and types.
The above analysis of the difference between the two relays by Fanhua, if you have any questions, please call our consulting service hotline: +86-573-83872666