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Table of contents for the manual
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Page 1
BSC 7107 DC Brushless Control Installation and Operating Manual 9/97 MN1231[...]
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T able of Contents T able of Contents i Section 1 General Information 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Limited W arranty 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety Notice 1-3 . . . . . . . . . . . .[...]
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ii T able of Contents[...]
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Section 1 General Information General Information 1-1 Introduction Baldor Series BSC 7107 control is a general purpose brushless DC motor control. This control commutates power into standard 3-phase brushless (BLDC) motors. The control input line voltage is 120 V AC ± 10%. This control provides up to 7 amperes of continuous current to the motor . [...]
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1-2 General Information Limited W arranty Fo r a period of one (1) year from the date of original purchase, BALDOR will repair or replace without charge controls and accessories which our examination proves to be defective in material or workmanship. This warranty is valid if the unit has not been tampered with by unauthorized persons, misused, abu[...]
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General Information 1-3 Safety Notice This equipment contains voltages that may be as great as 1000 volts! Electrical shock can cause serious or fatal injury . Only qualified personnel should attempt the start-up procedure or troubleshoot this equipment. This equipment may be connected to other machines that have rotating parts or parts that are dr[...]
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1-4 General Information W ARNING: Be sure the system is properly grounded before applying power . Do not apply AC power before you ensure that all grounding instructions have been followed. Electrical shock can cause serious or fatal injury . W ARNING: Do not remove cover for at least five (5) minutes after AC power is disconnected to allow capacit[...]
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Section 2 Receiving & Installation Receiving & Installation 2-1 Receiving The control is thoroughly tested at the factory and carefully packaged for shipment. When you receive your control, there are several things you should do immediately . 1. Observe the condition of the shipping container and report any damage immediately to the commerc[...]
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2-2 Receiving & Installation Figure 2-1 Mounting Diagram 6.70 9.00 7.50 6.30 0.20 7 / 32 dia. (4 places) 2.90 T op View End V iew AC Power Connection Refer to Figure 2-2. A fused 120 V AC power source is required. A 12 AMP fuse should be used. 1. Be sure the AC source is disconnected (OFF). 2. Be sure the appropriate fuse is installed at the so[...]
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Receiving & Installation 2-3 Figure 2-2 Control Connection Locations P4 Upper Board P1 GND (Connect to plant “Earth” ground). AC Line BLDC Motor Connection s. Scaled motor current test point. 1 10mV = 1A Motor Current. 60 ° / 120 ° Jumper 120 ° 60 ° Lower Board T erminal tightening torque = 4 Lb-in (0.45 Nm) (Black) (Red) + Hall 10K 10K[...]
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2-4 Receiving & Installation Sensor and Motor Connections Refer to Figure 2-2. Brushless DC motors have eleven (1 1) wires: three (3) motor phase power wires, three (3) hall sensor wires, two (2) wires for hall sensor power and sensor common, one (1) wire for motor ground and two (2) wires for motor thermal switch. Note: Baldor BLDC motors have[...]
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Receiving & Installation 2-5 Reverse Operation T erminal P4–REV is the forward/reverse control. Y ou can reverse motor direction by connecting P4–REV to P4–COM. Use a jumper wire, switch, relay , or an open collector NPN transistor . Caution: Before reversing directions, make sure the motor is stopped. This control is not designed for plu[...]
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2-6 Receiving & Installation 1st Time Power Up Procedure (or after a motor is replaced) Caution: If full AC V oltage is applied and the motor connections are wrong, the control will be damaged. Apply 10% of the input voltage to test motor lead connections at the first time power up or after a motor is replaced. It is strongly recommended that a[...]
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Section 3 Adjustments Adjustments 3-1 Current Limit Adjustment The current limit adjustment is factory set at 10 AMPS and you should not have to increase this setting for the Series BSC 7107 control. Rotating the I Limit potentiometer on the upper board CCW decreases the current limit. T o calculate motor current, refer to Figure 2-2 and measure th[...]
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3-2 Adjustments Minimum Speed Adjustment 1. Set the Speed Pot to zero speed (fully CCW). 2. Set the MIN pot on the upper board (Figure 2-2) fully CCW . 3. Apply power to the control. 4. Slowly rotate the MIN CW until the motor begins to rotate. Then turn the pot CCW until the motor just stops. The control will now run with a near–zero deadband. 5[...]
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Section 4 Specifications and Data Specifications 4-1 Specifications Input V oltage 120 V AC ± 10% . . . . . . . . . . . . . . . . . . . . . Output V oltage (Filtered Output) 0 to 140 VDC . . . . . Load Current (Continuous) 7 Amperes . . . . . . . . . . . . . Overload Current 150% for 30 seconds . . . . . . . . . . . . . Speed Range 50:1 . . . . . [...]
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4-2 Specifications Hall Signal Timing Diagram S1 (White) S2 (Y ellow) S3 (Orange) 0 0 0 15 30 60 30 60 120 45 60 90 60 120 240 75 150 300 90 180 360 105 210 420 120 240 480 135 270 540 150 300 600 165 330 660 180 360 720 Ć 8 Pole Mechanical Degrees Ć 4 Pole Mechanical Degrees Ć Electrical Degrees Hall Sensor Leads ( Hall generated signal) Brushl[...]
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BALDOR ELECTRIC COMP ANY P .O. Box 2400 Fort Smith, AR 72902–2400 (479) 646–471 1 Fax (479) 648–5792 © Baldor Electric Company Printed in USA MN1231 9/97 PS50[...]