26231941 Crouzet USA, 26231941 Datasheet - Page 140

• Manufacturer Part Number: 26231941
• Description: CAPACITOR, MOTOR MEDIUM TORQUE CAPACITOR, MOTOR MEDIUM TORQUE
• Manufacturer: Crouzet USA

Specifications of 26231941

• Capacitance: 0.1UF
• Voltage Rating, Dc: 700V
• Capacitor Dielectric Type: POLYPROPYLENE
• Tolerance,: 10%
• Tolerance, -: 10%
• Temp, Op. Max: 85(DEGREE C)
• Temp, Op. Min: 0(DEGREE

5
140
It is useful to examine the principal characteristics of stepper motors and
evaluate their advantages
The basic advantage of a stepper motor is that it can operate within
an open loop, that is to say that in normal operating conditions, for n
impulses one obtains n steps.
Stepper motors are found in numerous applications such as :
photocopiers, typewriters, bank printers, computer peripherals, x-y
plotters, instrumentation, medical pumps, drip feeders, vending machines,
gaming machines, automobiles, heating and ventilation and process
control.
The operation of a stepper motor requires the presence of the following
elements :
■
■
■
➜ The variable reluctance stepper motor
This type of motor functions according to the Law of maximum flux.
Constitution :
■
■
➜ The permanent magnet stepper motor
Constitution :
■
■
The advantages of stepper motor
Characteristics
No brushes
Open loop operation
Several step angles
available
Direct motor drive from a
digital signal
Principles of stepper motors
A stator with teeth
A rotor with teeth
A stator with teeth
A magnetised rotor
A control unit ( a micro-processor for example) which supplies impulses
the frequency of which is proportional to the speed of the motor. This
applies equally to both directions of rotation;
A sequencer which will direct the impulses to the various motor coils.
A power supply.
1
ST
Control unit
step
2
ND
Power supply
Advantages
No wear, therefore long
operating life
No need for encoder or emulator (cost
reduction)
Provides optimum characteristics for
the resolution of speed/load.
Easy integration into a
complex system
Sequencer
step
3
RD
step
Motor
➜ 2-phase motor - two-pole supply
➜ 4-phase motor - single-pole supply
➜ 2 phases
➜ 4 phases
1 phase on
2 phases on
1/2 step
1 phase on
2 phases on
1/2 step
Different types of energisation
I1
I
0
-I
0
I
-I
-I
I
I
I
0
-I
-I
-I
0
I
I11
I
0
0
0
I
0
0
I
I
I
0
0
0
0
0
I
I2
0
I
0
-I
I
I
-I
-I
0
I
I
I
0
-I
-I
-I
0
0
I
0
0
I
I
0
0
0
0
I
I
I
0
0
I12
0
90
180
270
45
135
225
315
0
45
90
135
180
225
270
315
°
I21
0
I
0
0
I
I
0
0
0
I
I
I
0
0
0
0
I22
0
0
0
I
0
0
I
I
0
0
0
0
0
I
I
I
°
0
90
180
270
45
135
225
315
0
45
90
135
180
225
270
315