Transcript DC Motor Simplified SPICE Model

D.C. Motor
Simplified SPICE Model
All Rights Reserved Copyright (C) Bee Technologies Corporation 2012
1
Contents
1. Benefit of the Model
2. Model Feature
3. Parameter Settings
4. D.C. Motor Specification (Example)
5. Motor Start Up Simulation at Normal Load
6. Motor Start Up Simulation at Half of Normal Load
7. Lj of the Motor Model (1/2)
8. Application Example
9. Winding Characteristic Parameters: Lm
10.Winding Characteristic Parameters: Rm
Simulation Index
All Rights Reserved Copyright (C) Bee Technologies Corporation 2012
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1. Benefit of the Model
• The model enables circuit designer to use D.C. Motor as load in
their design which include: Back EMF, Torque(Nm) and Speed
(rpm) characteristics.
• The model can be easily adjusted to your own D.C. Motor
specifications by editing a few parameters that are provided in the
spec-sheet.
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2. Model Feature
•
•
This D.C. Motor Simplified SPICE Model is for users who require the model
of D.C. Motor as a part of their system.
Perform electrical (voltage and current) and mechanical (speed and torque)
characteristics at current load (Ampere) conditions.
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3. Parameter Settings
Model Parameters:
+
-
U1
SMPL_DC_MOTOR
Rm = 0.1
Lm = 100u
V_norm = 7.2
mNm = 19.6
kRPM_norm = 14.4
I_norm = 6.1
IL = 6.1
If there is no measurement data, the default value will be
used:
Rm: motor winding resistance []
Lm: motor winding inductance [H]
Data is given by D.C. motor spec-sheet:
V_norm: normal voltage [V]
mNm: normal load [mNm]
kRPM_norm: speed at normal load [kr/min]
I_norm: current at normal load [A]
D.C. Motor model and Parameters with Default Value
Load Condition:
IL: load current [A]
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5
4. D.C. Motor Specification (Example)
+
-
U1
SMPL_DC_MOTOR
Rm = 0.1
Lm = 100u
V_norm = 7.2
mNm = 19.6
kRPM_norm = 14.4
I_norm = 6.1
IL = 6.1
D.C. Motor Specification
Parameters are input
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5. Motor Start Up Simulation at Normal Load (1/3)
Simulation Circuit and Setting
PARAMETERS:
Input the Supply No
Load Voltage* and
Series Resistance
VOUT = 10.25
Rs = 0.5
VIM
Simplified D.C. Motor with
RS-540SH Spec.
VM
RS
{Rs}
Current Sensing
V1
T2 = 0.01m
V2 = {VOUT}
+
-
0
0
*No Load Voltage is adjusted until the D.C. motor voltage (VM) equals to the normal voltage (7.2V).
U1
SMPL_DC_MOTOR
Rm = 0.1
Lm = 100u
V_norm = 7.2
mNm = 19.6
kRPM_norm = 14.4
I_norm = 6.1
IL = 6.1
Load Condition IL=I_norm
*Analysis directives:
.TRAN 0 400m 0 0.1m
.PROBE V(*) I(*) W(alias(*)) D(alias(*)) NOISE(alias(*))
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5. Motor Start Up Simulation at Normal Load (2/3)
Select “All” for the
Voltages and Currents
Data Collection Options.
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5. Motor Start Up Simulation at Normal Load (3/3)
80V
40V
Torque Load= 19.6mNm
0V
V(X_U1.TRQ)
20A
D.C. Motor Speed = 14.4krpm
10A
0A
I(X_U1.V_kRPM)
10V
D.C. Motor Voltage = 7.2V
5V
SEL>>
0V
V(VM)
20A
D.C. Motor Current = 6.1A
10A
0A
0s
40ms
80ms
120ms
160ms
200ms
240ms
280ms
320ms
360ms
400ms
I(VIM)
Time
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9
6. Motor Start Up Simulation at Half of Normal Load (1/2)
Simulation Circuit and Setting
PARAMETERS:
Input the Supply No
Load Voltage* and
Series Resistance
VOUT = 10.25
Rs = 0.5
VIM
Simplified D.C. Motor with
RS-540SH Spec.
VM
RS
{Rs}
Current Sensing
V1
T2 = 0.01m
V2 = {VOUT}
+
-
0
0
*No Load Voltage is adjusted until the D.C. motor voltage (VM) equals to the normal voltage (7.2V).
U1
SMPL_DC_MOTOR
Rm = 0.1
Lm = 100u
V_norm = 7.2
mNm = 19.6
kRPM_norm = 14.4
I_norm = 6.1
IL = 3.05
Load Condition IL=I_norm
*Analysis directives:
.TRAN 0 400m 0 0.1m
.PROBE V(*) I(*) W(alias(*)) D(alias(*)) NOISE(alias(*))
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6. Motor Start Up Simulation at Half of Normal Load (2/2)
80V
40V
Torque Load= 9.8mNm
0V
V(X_U1.TRQ)
20A
D.C. Motor Speed = 18.4krpm
10A
SEL>>
0A
I(X_U1.V_kRPM)
10V
D.C. Motor Voltage = 8.725V
5V
0V
V(VM)
20A
10A
D.C. Motor Current = 3.05A
0A
0s
40ms
80ms
120ms
160ms
200ms
240ms
280ms
320ms
360ms
400ms
I(VIM)
Time
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11
7. Lj of the Motor Model (1/2)
Simulation Circuit and Setting
PARAMETERS:
VOUT = 10.25
Global parameter
Lj is assigned
Double click to edit
properties of the DC
Motor model
Rs = 0.5
Lj = 100m
VIM
VM
RS
{Rs}
V1
T2 = 0.01m
V2 = {VOUT}
+
-
*Analysis directives:
0
.TRAN 0 400m 0 0.1m
.STEP PARAM Lj LIST 100m, 200m
0
U1
SMPL_DC_MOTOR
Rm = 0.1
Lm = 100u
V_norm = 7.2
mNm = 19.6
kRPM_norm = 14.4
I_norm = 6.1
IL = 6.1
Input the Lj value or input
“{Lj}” for parametric sweep
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7. Lj of the Motor Model (2/2)
The Motor Start-up Waveform is
changed by the Lj values.
80V
Lj=200m
Torque Load= 19.6mNm
40V
0V
Lj=100m
V(X_U1.TRQ)
20A
D.C. Motor Speed = 14.4krpm
Lj=100m
10A
Lj=200m
0A
I(X_U1.V_kRPM)
10V
D.C. Motor Voltage = 7.2V
Lj=100m
5V
Lj=200m
0V
V(VM)
20A
Lj=200m
D.C. Motor Current = 6.1A
10A
SEL>>
0A
0s
Lj=100m
40ms
80ms
120ms
160ms
200ms
240ms
280ms
320ms
360ms
400ms
I(VIM)
Time
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8. Application Example (1/3)
Simulation Circuit and Setting
VDD
VCC
VCC
Vdd
15V
0
Vcc
15V
0
D2
D4001
+
-
Simplified D.C. Motor with
RS-380PH Spec at No load.
U2
SMPL_DC_MOTOR
Rm = 0.576
Lm = 165u
V_norm = 7.2
mNm = 9.8
kRPM_norm = 14.2
I_norm = 2.9
U1
IL = 0.6
NC
R1
1u
VCC VDD
A
K
V1
V1 = 0
V2 = 1.8
TD = 0
TR = 10n
TF = 10n
PW = 199.99u
PER = 400u
0
No load IL=0.6
RG
120
NC
D3
DGT10J321_s
VO
NC
U3
GT10J321
GND
TLP350
0
0
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0
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8. Application Example (2/3)
Measurement
Simulation
1
14A
2
20V
12A
10V
10A
0V
Motor Voltage (10V/Div)
8A
-10V
6A
-20V
Motor Current (2A/Div)
4A
-30V
2A
-40V
0A
-50V
-2A
>>
-60V
-100ms 0s 100ms
1
I(U2:1) 2
300ms
500ms
V(U2:1,U2:2)
Time
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700ms
900ms
15
8. Application Example (3/3)
Measurement
Simulation
1
IGBT: VGE
14A
2
50V
3
20V
12A
40V
10V
10A
30V
0V
IGBT: VGE (10V/Div)
8A
20V
-10V
6A
10V
-20V
4A
0V
-30V
IGBT: VCE (10V/Div)
IGBT: VCE
IGBT: IC
2A
-10V
-40V
0A
-20V
-50V
>>
-2A
IGBT: IC (2A/Div)
-30V
-60V
898.0ms
898.4ms
1
I(U3:C) 2
898.8ms
899.2ms
899.6ms
V(U3:C) 3
V(U3:G)
Time
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16
9. Winding Characteristic Parameters: Lm
14A
50V
Winding Characteristic:
1
2 Lm
+
-
U2
SMPL_DC_MOTOR
Rm = 0.576
Lm = 165u
Motor Spec.
V_norm = 7.2
mNm = 9.8
kRPM_norm = 14.2
I_norm = 2.9
IL = 0.6
3
20V
12A
40V
10V
10A
30V
0V
8A
20V
-10V
6A
10V
-20V
4A
0V
-30V
2A
-10V
-40V
Lm=100u
Lm=165u
Load Condition
Lm=100u
The Motor Current Waveform is
changed by the Lm values.
Lm=165u
1
0A
-20V
-2A
-30V
I(U3:C)
-50V
>>
-60V
898.0ms 898.4ms
2
V(U3:C) 3
898.8ms 899.2ms
V(U3:G)
Time
All Rights Reserved Copyright (C) Bee Technologies Corporation 2012
899.6ms
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10. Winding Characteristic Parameters: Rm
Winding Characteristic: Rm
+
-
U2
SMPL_DC_MOTOR
Rm = 0.576
Lm = 165u
Motor Spec.
V_norm = 7.2
mNm = 9.8
kRPM_norm = 14.2
I_norm = 2.9
Rm=0.1
IL = 0.6
Load Condition
Rm=0.576
The Motor Start-up is Current
changed by the Rm values.
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Simulation Index
Simulations
Folder name
1. Motor Start Up Simulation at Normal Load................... Normal
2. Motor Start Up Simulation at Haft of Normal Load........ Half
3. Lj of the Motor Model....................................................
All Rights Reserved Copyright (C) Bee Technologies Corporation 2012
Lj
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