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Introduction 

 

 

The 306 Spindle Amplifier was designed to be used with the MPM1902R-1368 spindle motor. 
This motor is wound in a WYE configuration with four windings in each leg.  The legs are 
connected by a system of relay switches mounted on the side of the motor that change the 
motor KE and KT. This allows up to 10 horsepower in four speed ranges, eliminating the need 
for any complex mechanical gear reductions. 

 

The TAC output of the amplifier is scaled to the speed ranges as follows: 
 

Low Speed 1 

690 rpm 

TAC output = .69 volts 

Med Low Speed 2 

1630 rpm 

TAC output = 1.63 volts 

Med High Speed 3 

3300 rpm 

TAC output = 3.3 volts 

High Speed 4 

5000 rpm 

TAC output = 5.0 volts 

 
The amplifier has overcurrent sensing which will cause the amplifier to shut down and produce 
a stall fault if the continuous current rating of the amplifier is exceeded by 20%.  The stall fault 
also occurs if a speed variation between Command and actual TAC Feedback occurs.  This is 
factory set to 20%. 
 
The amplifier also has an I/O selectable orient feature.  This causes the motor shaft to rotate 
at a fixed rate of 1 rev per second in a CCW direction viewed from the shaft end of the motor. 
 
Ramping of the command input signal for a time period of 2 to 10 seconds is user selectable.  
A DIP switch allows ramping to be enabled and disabled through the I/O connector. 
 
An analog dc voltage output that is proportioned to the output current is also supplied. 

 
 

Spindle Sizes Available 

 

 

Horsepower 

Required  
Amplifier 

Amplifier Input 

Voltage 

Required 

 Motor 

10 

MPA-50-306 

230 Vac 

MPM1902R-1368 

 
 

Содержание MAXPLUS 306

Страница 1: ...ment by MTS Automation During the warranty period a defective amplifier unit will be repaired or replaced as outlined below Before requesting return authorization please try to verify that the problem...

Страница 2: ...upon your receipt of the replacement Non Warranty Service Return your defective unit freight prepaid and it will be repaired on a time and material basis and returned within three weeks of receipt OR...

Страница 3: ...lifier has overcurrent sensing which will cause the amplifier to shut down and produce a stall fault if the continuous current rating of the amplifier is exceeded by 20 The stall fault also occurs if...

Страница 4: ...llector Fault Output open collector At Speed Output Note 30 volts open circuit 15 amps max when ON Fault Protection Stall Shorts Stator Amplifier Temperature Feedback Resolver Tracking Motor Thermal H...

Страница 5: ...6 14 6 FRONT VIEW 2 Clearance External Thermal Switch External Shunt Connection 5 RECOMMENDED C SIDE VIEW Summary of Amplifier Dimensions MODEL A in B in C in MPA 50 306 8 5 6 5 10 63 NOTE If front c...

Страница 6: ...IG RESP CUR BAL RESET FEEDBACK SHLD SHLD GND GND GND GND REF COS TS SIN STALL SLOW RESET HI BUS MOTOR FEEDBACK AMPLIFIER SHORTS CURRENT MARK ENCODER POWER I O AT SPEED ORIENT RAMPS GND COM COM CUR TAC...

Страница 7: ...il and braid The pairs do not have to be twisted The resolver wiring should not be run adjacent to any non shielded high voltage wires such as the motor wires RST If the wiring cannot be separated the...

Страница 8: ...occurs STATOR SHORTS If shorts in the stator wiring occur this comes ON AMPLIFIER THERMAL An 85 C thermostat is mounted to the amplifiers IGBT heat sink and shunt load If an excess temperature is sens...

Страница 9: ...COMPATIBLE 2 THEY SHOULD BE CONNECTED TO COMPATIBLE DIFFERENTIAL RECEIVERS 3 THE BEST SHIELDING APPROACH WOULD BE TO CONNECT THE SHIELD AT THE AMPLIFIER END ONLY 4 ALL SIX WIRES AND A GND CONNECTION S...

Страница 10: ...ENT RAMPS GND COM COM CUR TAC GND FLT SPD 1 SLOW SPD 0 ENB I O WIRING EXAMPLE The actual decision as to open or closed switches occurs at a voltage level between 5 8 volts DC Less than 5 volts is acti...

Страница 11: ...ese are open collector NPN 2N7053 transistors with their emitters connected to GND Each output can be connected to a 30 Vdc maximum open circuit voltage source Each transistor will sink 15 amps when i...

Страница 12: ...haft 10 volts is then used to control velocity and the SIG pot is used for velocity adjustments If the COMMAND voltage is applied to the COMMAND signal input then an opposite shaft rotation occurs The...

Страница 13: ...SIG RESP CUR BAL RESET ENCODER I O AT SPEED ORIENT RAMPS GND COM COM CUR TAC GND FLT SPD 1 SLOW SPD 0 ENB Outputs Two diagnostic outputs are the dc voltage proportional to velocity and the dc output...

Страница 14: ...e COM and COM connections must be reversed 14 13 12 11 10 9 8 7 6 5 4 3 2 1 CMD GND COM COM 1 2 3 1 2 3 1 2 3 GND COMMAND TYPICAL EXTERNAL CONTROLLER WITH DIFFERENTIAL DRIVERS MPA AMPLIFIER I O AND AN...

Страница 15: ...tor With the shorting pin in the bipolar position the output CUR signal is plus for positive current and minus for negative current The voltage range is plus and minus ten where ten equals the amplifi...

Страница 16: ...sition default the amplifier must be power cycled to reset any faults In the right position the faults can be cleared with the reset button or by toggling the enable input Spindle Ramp Times DIP 1 Swi...

Страница 17: ...e to withstand the voltage current ratings applied A ground terminal is supplied and should be connected to earth ground Internal Protection These amplifiers have internal AC Input fuses and a shunt f...

Страница 18: ...ed to earth ground Typical WYE Secondary L1 HOT L2 HOT L3 HOT GND EARTH GROUND Typical Delta Secondary EARTH GROUND L2 HOT GND L1 HOT L3 HOT These are the two most typical transformer configurations a...

Страница 19: ...transformers to depict all combinations The MPA amplifier does not care where the earth ground is This example is a delta secondary Delta Secondary L2 NEUTRAL GND L1 HOT L3 HOT EARTH GROUND In this ex...

Страница 20: ...an ungrounded Delta secondary connection The examples show acceptable A1 A2 and A3 and unacceptable U1 U2 U3 configurations If it is not possible to visually inspect the transformer configuration you...

Страница 21: ...d a transformer with a grounded secondary may need to be added to the system before power is applied If you find one of the unacceptable connections above you must A Ground the secondary if possible B...

Страница 22: ...t determine the speed ranges The motor has four 120 Vac inputs that have to be active based on the desired speed range Amplifier Inputs Motor Inputs SPD 1 SPD 0 LOW 1 690 rpm GND GND Connect L1 to LOW...

Страница 23: ...23 Motor and Motor Relay Wiring...

Страница 24: ...is continuous rating Derating the stator wiring for three phase operation should not be done Model Locked Rotor MPA 50 306 50 Amps A ground terminal is supplied and should be connected to earth ground...

Страница 25: ...loads are thermally protected to 85 C maximum there is a fuse in series with the shunt load to limit average power in the shunt and if this fuse blows then another circuit measures the bus for an eve...

Страница 26: ...26 Shunt Amplifier Wiring...

Страница 27: ...27 EXS 50 230 Mechanical Footprint 0 5 6 16 0 15 5 0 5 0 0 1 0 8 5 9 5...

Страница 28: ...ts continuous rating is impaired by the heat rise from the ambient temperature and the amplifier will thermally shut down once the 85 condition is sensed at either the bridge or the shunt load A guide...

Страница 29: ...ustment is done at spindle speeds of 50 100 rpm The adjustment should be checked on all the possible speeds For start up verification of wiring with external position controls the following simple tes...

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