Advertisement
Stepping-motor-drive – Circuit Schematic
Stepping-motor-drive
The circuit shown in Fig. 62-15A is designed to drive a 15-V, two-phase, bipolar stepping motor, providing a bidirectional single level voltage across each w...
Pwm-motor-controller – Circuit Schematic
Pwm-motor-controller
The PWM controller uses complementary half-H peripheral drivers SN75603 and SN75604, with totem-pole outputs rated at 40 V and 2.0 A. These drivers effectively...
Speed-controlled-reversible-dc-motor-drive – Circuit Schematic
Speed-controlled-reversible-dc-motor-drive
The figure illustrates a reversible de motor drive application with adjustable speed control. The D inputs for these drivers are complementary and can be tied ...
Bridge-type-ac-servo-amplifier – Circuit Schematic
Bridge-type-ac-servo-amplifier
This motor driver circuit uses a p.A759 power0 amplifier ...
Dc-motor-drive-with-fixed-speed-control – Circuit Schematic
Dc-motor-drive-with-fixed-speed-control
The NE5561 provides pulse-proportional drive and speed control based on de tachometer feedback. This simple switching circuit consists of transistor 2N4920 pnp...
Constant-speed-motor-driver – Circuit Schematic
Constant-speed-motor-driver
When the torque load on the motor increases, its current increases. This current increase is sensed across Rs, and positive feedback is applied to the noninvert...
Tachless-motor-speed-controller – Circuit Schematic
Tachless-motor-speed-controller
This circuit is particularly applicable to digitally-controlled systems in robotic and X-Y positioning applications. By functioning from the 5-V logic supply, ...
Closed-loop-motor-speed-control – Circuit Schematic
Closed-loop-motor-speed-control
This electronic motor-speed control circuit is designed to operate in an electrically noisy environment. The circuit includes an optoelectronic pickup device. ...
Switched-mode-motor-speed-controller – Circuit Schematic
Switched-mode-motor-speed-controller
This circuit uses a tachometer to generate a feedback signal which is compared to a reference supplied by the auxiliary output. When power is applied, the ta...
Efficient-switching-controller – Circuit Schematic
Efficient-switching-controller
This high-performance switching controller for a low-power de servo motor uses a symmetrical complementary- transistor bridge. The bridge acts as a reversing sw...
Start-and-run-motor-circuit – Circuit Schematic
Start-and-run-motor-circuit
The timed two-voltage circuit can start and run a small de motor or solenoid. The input voltage to the LM317 three-terminal regulator ranges from 5 to 40 V, an...
Power tool torque control – Circuit Schematic
Power tool torque control
As the speed of an electric drill is decreased by loading, its torque also drops. A compensating speed control like this one puts the oomph back into the motor....
Universal motor speed control – Circuit Schematic
Universal motor speed control
The resistor capacitor network R1-R2-C1 provides a ramp-type reference voltage superimposed on top of a dc voltage adjustable with the speed-setting potentiomet...
Direction and speed control – Circuit Schematic
Direction and speed control
This circuit operates like the one shown in Fig, 57-4, The only differences are that the field is placed across the rectified supply and the armature is placed ...
Speed control for model trains or cars – Circuit Schematic
Speed control for model trains or cars
Low voltage speed control gives very good starting torque and excellent speed regulation...
Universal motor control – Circuit Schematic
Universal motor control
When the time delay expires, SCRl conducts and removes the gate signal from SCR2, which stops the motor. Both the time delay and motor speed are adjustable by p...
DC motor speed control – Circuit Schematic
DC motor speed control
The circuit uses a 4011 CMOS NAND gate, a pair of diodes and an NPN power transistor to provide a variable duty-cycle dc source. Adjusting the speed control var...
Induction-motor control – Circuit Schematic
Induction-motor control
This single time-constant circuit can be used as proportional speed control for induction motors such as shaded pole or permanent split-capacitor motors when th...
Model train speed control – Circuit Schematic
Model train speed control
Virtually any NPN small signal transistor may be used in place of the BC 108 shown. Likewise any suitable NPN power transistor can be used in place of the 2N305...
Motor speed control – Circuit Schematic
Motor speed control
Universal motors and shade d-pole induction motors can be easily controlled with a full-wave Triac speed controller. Q1 combines both the triac and diac trigger...