Tinh Toan Cho FAN Pump
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Transcript of Tinh Toan Cho FAN Pump
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Inverter ApplicationFor FAN/Pump
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Load Characteristic
Load Characteristic
Speed
Torque
Reduced torque
Note:Vacuum Pump has different characteristic
Constant Torque loadWinding-Traverse
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Acceleration ta Available to get 120% rated torque
ta=[JNmax][9.55(1.2Tm-TL)] in acceleration,it is not necessary to set a large value.
Deceleration td The torque is about 10 to 20 %
td=[JNmax][9.55(0.1*Tm+TL)] in deceleration,and the Fan which haslarge inertia should be set a long time
for a deceleration.
Calculation for Acceleration/Deceleration
JAll inertia on motor shaft (kg.m2NmaxMaximum revolution(rpm)TmRated motor torque(N.m) TL Load torque(N.m) for the calculation of deceleration time,TL=0
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Brake unit register) selection procedure
Calculation of deceleration time Tb=[JNmax][9.55tb] Tbrequired del. torque (Nm)
tblimit of del.. Time(sec)Regenerated power Pb=0.105NmaxTb (w)
Calculation of regeneration of Register (Rb) Rb=VPN2[1.2Pb] (VPN 200Vclass:350V
400Vclass :700V
Selection of regenerated register value and typeCalculate %ED(ratio of continuous usage ,compare the specification of register.
Selection of BRD unit Inverter model has integrated BRD model and no equipment model.
In case of equipment model, selectproper register type.
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Easy reducing procedure for acceleration time
Rev
olu
t io n
N1
Nmax
td1
tdN1 Nmax
TL1
Range of standard use
td1=[J(Nmax-N1)][9.55(0.1Tm+TL1)] Possible to set the deceleration time until lower load torque.
terminal SET for 2 step acceleration
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The function for FAN Pump application Control MethodControl Method V/F Control V/F constant control(V
characteristic)
V/F reduced torque (VP F1.7)
V/F free setting (desired characteristic)
Energy saving drive
Vector control Vector control with an EncoderSensor less Vector Control without
an Encoder
Control Method for FAN and Pump
Control Method for Carriers and Lift
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Auto save energy drive
Auto save energy driveP
ower
Driving Frequency
Automatically adjusted to save energy
Normal V/F drive Auto save drive
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Limit of driving range Frequency limitter
Frequency limitter function
Ou
tpu
t fr
e qu
ency
Frequency command
fHLIM
fLLIM
Available to set a upper and lower limit of frequency even analog input is not in
upper fHLIMlower fLLIM
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Limit of driving range External Frequency command
a.Start Frequency enableOu
tput
Frequen
cy
Frequency Command
OS OE
Even if analog input signal for frequency command is 0 Hz,Start Frequency will be fs.
O-L input active range for start frequency
O-L input active range for end frequency
O-L input active range for start voltageOS
O-L input active range for end voltageOE
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b. Start Frequency enable
Limit of driving range External Frequency command
OS OE
Output
Frequen
cy
Frequency Command
If analog input signal is lower than Os[v], Inverter will not start, and if input exceed Os, inverter will start with fs.
O-L input active range for start frequency
O-L input active range for end frequency
O-L input active range for start voltageOS
O-L input active range for end voltageOE
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For avoiding machine vibration or noise by resonance,inverter can avoid the resonance frequency in acceleration and deceleration.
Avoid of resonance:Jump frequency
Escape zone for resonance
Output frequency
Frequency command
Available to set 3 frequency.
Jump frequency setting1Jump frequency setting2Jump frequency setting3Jump frequency width setting1Jump frequency width setting2Jump frequency width setting3
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Automatic Restart-1 Accordance with peripheral unit
setting param eter A ctivityAllowable under-voltage power failure timeb002
This setting is no influence to peripheral units, set a time for restart . If instantaneous time is over than this time, inverter is trip not to give any influence to peripheral units.
Retry wait time before motor restart(b003)
For the setting on this parameter, all peripheral unit received reset signal after recover the power failure.The setting value is the waiting time for reset signal receipt. If this time setting is too short, inverter may be over current trip.
Instantaneous powerfailure/under-voltage trip events(b004)
In case of automatic restart is not proper system, inverter is just trip after power failure happened. No use of automatic restart.
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Automatic Restart- Restart procedure)
Restart procedure after power failure recovered,it decided, by load torque or inertia characteristic,and motor revolution drop level when power failure occurred.
Load Inertia Loadtorque
Revolution drop
proper control
FAN big small small after frequencymatching,restart
Pump small big big 0Hz start
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Countermeasure of motor revolution drop when motor restart
Pump
Revolution drop
Pressure drop
System down
Counter measure
After recover power supply,quick restart
Set short time for retry wait timebefore restart
Possibility of over current trip
Low inertia&
heavy load
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Cause of over current trip - Motor residual voltage
V=V0exp[-1/T2t]exp[jrt]T2Motor time constant
r Motor angular speedrevolution
Cut off out put frequency
Motor residual voltage attenuation characteristic
The motor residual voltage attenuation characteristic After power off, high
voltage is remaining in short time
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Cause of over current trip -2 Motor residual voltage
Secondary constants on standard motor (4P)
M otor(kw) Tim e constant (s) M otor(kw) Tim e constant (s) 3.7 0.12 30 0.58 5.5 0.12 37 0.79 7.5 0.13 55 0.84 11 0.22 75 0.89 15 0.37 110 1.19 22 0.50
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Cause of over current trip-:Short circuit at IGBT
Short Circuit Mode
Motor
residual voltage
Short circuit flow
InverterIGBT part
Active on all upper IGBT
Inverter ApplicationFor FAN/Pump
Load Characteristic
Load Characteristic
Speed
Torque
Reduced torqueNote:Vacuum Pump has different characteristic
Constant Torque loadWinding-Traverse
AccelerationtaAvailable to get 120% rated torqueta=[JNmax][9.55(1.2Tm-TL)] in acceleration,it is not necessary to set a large value.
Deceleration td The torque is about 10 to 20 % td=[JNmax][9.55(0.1*Tm+TL)]in deceleration,and the Fan which haslarge inertia should be set a long timefor a deceleration.
Calculation for Acceleration/Deceleration
JAll inertia on motor shaft (kg.m2NmaxMaximum revolution(rpm)TmRated motor torque(N.m) TLLoad torque(N.m) for the calculation of deceleration time,TL=0
Brake unit register) selection procedure
Calculation of deceleration time Tb=[JNmax][9.55tb] Tbrequired del. torque (Nm) tblimit of del.. Time(sec)Regenerated power Pb=0.105NmaxTb(w) Calculation of regeneration of Register (Rb) Rb=VPN2[1.2Pb] ( VPN 200Vclass:350V 400Vclass :700V Selection of regenerated register value and type Calculate %ED(ratio of continuous usage , compare the specification of register. Selection of BRD unit Inverter model has integrated BRD model and no equipment model. In case of equipment model, select proper register type.
Easy reducing procedure for acceleration time
Revolution
N1
Nmax
td1
td
N1 Nmax
TL1
Range of standard use
td1=[J(Nmax-N1)][9.55(0.1Tm+TL1)] Possible to set the deceleration time until lower load torque.
terminal SET for 2 step acceleration
The function for FAN Pump application
Control MethodControl Method V/F Control V/F constant control(V characteristic) V/F reduced torque (VP F1.7) V/F free setting (desired characteristic) Energy saving drive
Vector control Vector control with an Encoder Sensor less Vector Control without an Encoder
Control Method for FAN and Pump
Control Method for Carriers and Lift
Auto save energy drive
Auto save energy drive
Power
Driving Frequency
Automatically adjusted to save energy
Normal V/F drive
Auto save drive
Limit of driving rangeFrequency limitter
Frequency limitter function
Output frequency
Frequency command
fHLIM
fLLIM
Available to set a upper and lower limit of frequency even analog input is not in
upper fHLIMlower fLLIM
Limit of driving range External Frequency command
a.Start Frequency enable
Output Frequency
Frequency Command
OS OE
Even if analog input signal for frequency command is 0 Hz, Start Frequency will be fs.
O-L input active range for start frequency O-L input active range for end frequency O-L input active range for start voltage OSO-L input active range for end voltage OE
Limit of driving range External Frequency command
b. Start Frequency enable
OS OE
Output Frequency
Frequency Command
If analog input signal is lower than Os[v], Inverter will not start, and if input exceed Os, inverter will start with fs.
O-L input active range for start frequency O-L input active range for end frequency O-L input active range for start voltage OSO-L input active range for end voltage OE
Avoid of resonance:Jump frequency
For avoiding machine vibration or noise by resonance,inverter can avoid the resonance frequency in acceleration and deceleration.
Escape zone for resonance
Output frequency
Frequency command
Available to set 3 frequency.
Jump frequency setting1Jump frequency setting2Jump frequency setting3Jump frequency width setting1Jump frequency width setting2Jump frequency width setting3
Automatic Restart-1 Accordance with peripheral unit
setting parameter
Activity
Allowable under-voltage power failure timeb002
This setting is no influence to peripheral units, set a time for restart . If instantaneous time is over than this time, inverter is trip not to give any influence to peripheral units.
Retry wait time before motor restart(b003)
For the setting on this parameter, all peripheral unit received reset signal after recover the power failure. The setting value is the waiting time for reset signal receipt. If this time setting is too short, inverter may be over current trip.
Instantaneous power failure/under-voltage trip events(b004)
In case of automatic restart is not proper system, inverter is just trip after power failure happened. No use of automatic restart.
Automatic Restart-Restart procedure)
Restart procedure after power failure recovered,it decided, by load torque or inertia characteristic,and motor revolution drop level when power failure occurred.
Load
Inertia
Load torque
Revolution drop
proper control
FAN
big
small
small
after frequency matching,restart
Pump
small
big
big
0Hz start
Countermeasure of motor revolution drop when motor restart
Pump
Revolution drop
Pressure drop
System down
Counter measure
After recover power supply,quick restart
Set short time for retry wait time before restart
Possibility of over current trip
Low inertia &heavy load
Cause of over current trip -Motor residual voltage
V=V0exp[-1/T2t]exp[jrt] T2Motor time constantrMotor angular speedrevolution
Cut off out put frequency
Motor residual voltage attenuation characteristic
The motor residual voltage attenuation characteristic
After power off, high voltage is remaining in short time
Cause of over current trip -2Motor residual voltage
Secondary constants on standard motor (4P)
Motor(kw)
Time constant (s)
Motor(kw)
Time constant (s)
3.7
0.12
30
0.58
5.5
0.12
37
0.79
7.5
0.13
55
0.84
11
0.22
75
0.89
15
0.37
110
1.19
22
0.50
Cause of over current trip-:Short circuit at IGBT
Short Circuit Mode
Motor
residual voltage
Short circuit flow
Inverter IGBT part
Active on all upper IGBT