21-05-2014, 11:25 AM
Silicon Controlled Rectifiers
Silicon Controlled Rectifiers.ppt (Size: 347 KB / Downloads: 20)
A Silicon Controlled Rectifier (or Semiconductor Controlled Rectifier) is a four layer solid state device that controls current flow
The name “silicon controlled rectifier” is a trade name for the type of thyristor commercialized at General Electric in 1957
The operation of a SCR can be understood in terms of a pair of tightly coupled Bipolar Junction Transistors
SCR has three states:
Reverse blocking mode, forward blocking mode, and forward conducting mode
Reviews
A SCR is essentially a diode with an extra terminal added
This extra terminal is called the gate, and it is used to trigger the device into conduction by the application of a small voltage
DC Motors Current Driver
A rectifier is one or more diodes arranged for converting AC to DC
The current used to drive the DC motor typically comes from :
Fixed voltage:
Battery
Voltage regulator
Adjustable voltage:
PWM current source
Silicon controlled rectifier modulated AC source
Silicon Controlled Rectifiers.ppt (Size: 347 KB / Downloads: 20)
A Silicon Controlled Rectifier (or Semiconductor Controlled Rectifier) is a four layer solid state device that controls current flow
The name “silicon controlled rectifier” is a trade name for the type of thyristor commercialized at General Electric in 1957
The operation of a SCR can be understood in terms of a pair of tightly coupled Bipolar Junction Transistors
SCR has three states:
Reverse blocking mode, forward blocking mode, and forward conducting mode
Reviews
A SCR is essentially a diode with an extra terminal added
This extra terminal is called the gate, and it is used to trigger the device into conduction by the application of a small voltage
DC Motors Current Driver
A rectifier is one or more diodes arranged for converting AC to DC
The current used to drive the DC motor typically comes from :
Fixed voltage:
Battery
Voltage regulator
Adjustable voltage:
PWM current source
Silicon controlled rectifier modulated AC source