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Minarik SL10U User Manual

Adjustable speed control for hurst permanent magnet 90 vdc motors
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SL10U
Adjustable Speed Control
for Hurst Permanent Magnet
90 VDC Motors

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Summary of Contents for Minarik SL10U

  • Page 1 SL10U Adjustable Speed Control for Hurst Permanent Magnet 90 VDC Motors...
  • Page 2 All rights reserved. No part of this manual may be reproduced or transmitted in any form without written permission from Minarik Corporation. The information and technical data in this manual are subject to change without notice. Minarik Corporation and its Divisions make no warranty of any kind with respect to this material, including, but not limited to, the implied warranties of its merchantability and fitness for a given purpose.
  • Page 3 Safety Warnings Note: This symbol denotes an important safety message. Please read these sections carefully before performing any instructions contained in this manual. • Have a qualified electrical maintenance technician install, adjust and service this equipment. Follow the National Electrical Code and all other applicable electrical and safety codes, including the provisions of the Occupational Safety and Health Act (OSHA), when installing equipment.

  • Page 4: Table Of Contents

    Table of Contents General Information ..........1 Features .
  • Page 5 Table of Contents Run / Stop Using Normally Open Contacts ....... . .24 Reversing Circuits .
  • Page 6 SL10U Connections ........

  • Page 7: General Information

    General Information The Model SL10U Minarik adjustable speed control is a full-wave, solid-state device that is designed to control and vary the speed of Hurst 90 VDC permanent magnet motors. The control has choke/capacitor filtering to ensure quiet, smooth and cool running.

  • Page 8: Features

    General Information Features • Choke/Capacitor Filtering • Temperature Compensation • 2% Base Speed Regulation (Typical Application) • Maximum Speed Adjustment • Adjustable IR Compensation • Line Starting and Stopping • Line Voltage Compensation • Full Wave Armature Supply...

  • Page 9: Specifications

    Specifications Input Voltage 115 VAC, 50/60 Hz Single Phase Maximum Input Current 0.12 Amperes Output Armature Voltage 0 - 90 VDC Output Armature Current 0.07 Amperes Horsepower Range 1/250 – 1/50 Weight 8.0 Ounces Ambient Temperature Range 10° – 40° C...

  • Page 10: Dimensional Data

    Dimensional Data ALL DIMENSIONS IN INCHES [MILLIMETERS] Figure 1. Dimensions...

  • Page 11: Figure 2. Sl10U Connections

    Figure 2. SL10U Connections...

  • Page 12: Installation

    115 volts above ground. Please refer to Safety Warnings on page i before installing. The SL10U is an uncased chassis model and is designed to be installed in original equipment. The speed adjust pot (P1) and its mounting hardware is supplied with the control.
  • Page 13 Leave enough room around the outer dimensions of the chassis to allow access to the chassis after installation for removal, installing wiring, calibration and other related reasons. Connect the SL10U as shown in Figure 2 (page 5), and as described below.

  • Page 14: Alternative Wiring

    250 VAC and 150% of the maximum motor armature rating. Alternative Wiring By utilizing additional components the SL10U may be operated by external signal control, have multiple preset speeds, dynamic braking, limit switch operation, etc. Please refer to Application...

  • Page 15: Calibration

    Calibration Dangerous voltages exist on the printed circuit board. Contact with components and/or printed Warning circuitry could cause serious injury or fatality. Please refer to the Safety Warnings on page i. IMPORTANT: A non-metallic screwdriver should be used when adjusting the trim pots to avoid any possibility of the screwdriver’s blad contacting live circuitry and shorting the circuitry or allowing contact with any dangerous or fatal voltages.
  • Page 16 Calibration MAXIMUM SPEED ADJUSTMENT This feature is provided to allow the motor speed to be adjusted between 85 to 115% of motor name plate rated speed when the speed adjust knob is set at maximum. REGULATION (IR COMPENSATION) Regulation is obtained by circuitry which raises the armature voltage to maintain speed when increased loading tends to slow the motor down.

  • Page 17: Standard Calibration

    Calibration Standard Calibration The control has been factory calibrated and no further adjustments should be necessary. However, since the control was calibrated using a speed adjust pot (P1) of 10K ohms and the pot shipped with the control has a tolerance of ± 5%, the maximum speed could be higher or lower than 1800 RPM.
  • Page 18 Calibration Adjust the MAXIMUM SPEED trim pot for motor base speed at no load. Load the motor to full load and adjust the REGULATION trimpot to obtain the same speed as at no load.

  • Page 19: Figure 3. Maximum Speed And Regulation Trimpot Locations

    Calibration MAXIMUM SPEED REGULATION (IR COMP) Figure 3. Maximum Speed and Regulation Trimpot Locations...

  • Page 20: Application Notes

    Furthermore, Minarik Corporation assumes no responsibility for the use of any circuitry described and makes no representation that they are free from patent infringement.

  • Page 21: Speed Adjustment

    Application Notes Speed Adjustment The speed adjust potentiometer (P1), supplied with the control, is only one of many methods which can be used to control the motor speed. With any alternative methods, these precautions must be followed for proper control operation: a.

  • Page 22: Adjustable / Maximum Speed

    Application Notes Adjustable / Maximum Speed The addition of a single pole, double-throw switch or relay contact allows a selection of a continuously variable or a fixed maximum speed (see Figure 4 below). This is useful in applications where a fast return to the “home”...

  • Page 23: Multiple Fixed Speeds

    Application Notes Multiple Fixed Speeds This is accomplished by using a multi-position switch with the correct number of positions for the desired number of fixed speeds and the same number of resistors with a total series resistance of 10K Ohms to replace speed adjust pot (P1). See Figure 5 below. Figure 5.

  • Page 24: Adjustable Speeds In Two Or More Non-Overlapping Speed Ranges

    Application Notes Adjustable Speeds in Two or More Non-Overlapping Speed Ranges This is accomplished by replacing the speed adjust pot (P1) with two or more potentiometers connected in series (total series resistance must be 10K Ohms) and a multi-position switch. Illustrated is a connection diagram for two speed control with high and low speed adjust pots.

  • Page 25: Multiple Full Range Adjustable Speeds

    Application Notes Multiple Full Range Adjustable Speeds This is accomplished by replacing the speed adjust pot (P1) with two or more potentiometers connected in parallel (total parallel resistance must be 10K Ohms) and a multi-position switch. Illustrated is a connection diagram for two full range adjustable speeds.

  • Page 26: Independent Forward And Reverse Speeds

    Application Notes Independent Forward and Reverse Speeds This is accomplished by replacing the speed adjust pot (P1) with two 20K Ohm potentiometers connected in parallel (equals 10 Ohms) with a SPDT switch and a DPDT switch to select operating station. See Figure 8 below. Figure 8.

  • Page 27: External Signal Control

    DC voltage across the resistor. Use the speed adjust pot to set the motor’s minimum speed. If only a grounded signal is available, use a Minarik PCM4 Process Control Module to convert the signal to ungrounded (floating).

  • Page 28: Simultaneous Speed Control Of Multiple Systems

    Application Notes Simultaneous Speed Control of Multiple Systems Multiple drives can be controlled with a single speed adjust potentiometer using a PCM4 at the input of each drive to provide isolation (Figure 10). Optional ratio potentiometers can be used to scale the PCM4 output voltage, allowing independent control of each drive.

  • Page 29: Run / Stop Circuits

    Run / Stop Circuits Run / Stop Using Normally Closed Contacts This is accomplished by inserting a set of normally closed contacts in series with the violet wire that connects to the speed adjust pot. When the contacts are opened, the motor will coast to a stop. This method is desirable when dynamic...

  • Page 30: Run / Stop Using Normally Open Contacts

    Run/Stop Circuits Run / Stop Using Normally Open Contacts This is accomplished by inserting a set of normally open contacts in parallel with the gray and brown wires that connect to the speed adjust pot. When the contacts are closed, the motor will coast to a stop.

  • Page 31: Reversing Circuits

    Reversing Circuits Plug reversing the motor (not allowing the motor to come to a stop before reversing) will cause Warning excessively high currents to flow in the armature circuit, which can damage the control and/or motor and is not recommended. If rapid reversing is required, use one of the dynamic braking circuits listed in this manual.

  • Page 32: Reversing With A Toggle Or Rotary Switch

    Reversing Circuits Reversing with a Toggle or Rotary Switch This can be accomplished by using a DPDT, center off switch. When power is applied to the control and the switch is in the center position, the motor is stopped. When the switch is actuated in one direction, the motor will run forward.

  • Page 33: Reversing With Relays

    REVERSE pushbuttons are to be located remotely from the control, low voltage relay coils are used. In operation, power is applied to the SL10U control and the appropriate voltage to L1 and L2. When PB1 is actuated, the motor will run forward. When PB2 is actuated, the motor will stop.

  • Page 34: Figure 14. Reversing With Relays

    Reversing Circuits Figure 14. Reversing with Relays...

  • Page 35: Dynamic Braking

    Dynamic Braking DC Permanent Magnet Motor Dynamic Braking Theory In operation, a permanent magnet (PM) field DC motor has the armature connected to its DC power supply. The interaction of the magnetic field created by the field and the current flowing in the armature winding causes the motor to run.
  • Page 36 The lower the resistance, the greater the current flow. And, since the reversing current or braking torque is proportional to the current flow, the faster the stopping. For the SL10U a jumper wire instead of a resistor gives optimum braking.

  • Page 37: Dynamic Braking Circuit Cautions

    Dynamic Braking Dynamic Braking Circuit Cautions Gearmotor Caution Care must be taken when using dynamic braking with gearmotors connected to inertial type loads. Forces can be developed which may be destructive to the gearing. IMPORTANT: Dynamic braking is only for fast stopping and NOT for holding a load.

  • Page 38: Run/Stop With Dynamic Braking Using A Toggle Switch

    Dynamic Braking Run/Stop with Dynamic Braking using a Toggle Switch This can be accomplished with a SPDT toggle switch and a 12 AWG jumper wire in place of a dynamic braking resistor. Power is applied to the control. When the toggle switch is set to RUN, the motor starts running.

  • Page 39: Run/Stop Dynamic Braking Using A Relay

    Dynamic Braking Run/Stop Dynamic Braking using a Relay This can be accomplished with a DPDT relay, two momentary operated pushbutton switches (one normally open and one normally closed) and a 12 AWG jumper wire in place of a dynamic braking resistor.

  • Page 40: Figure 16. Run / Stop Dynamic Braking Using A Relay

    Dynamic Braking Figure 16. Run / Stop Dynamic Braking using a Relay...

  • Page 41: Reversing With Dynamic Braking Circuits

    Reversing with Dynamic Braking Circuits Reversing with Dynamic Braking using a Rotary Switch This can be accomplished with a 2-pole, 3-position rotary switch and a 12 AWG jumper wire in place of a dynamic braking resistor. When power is applied to the control and the rotary switch is switched to FORWARD, the motor starts running in one direction.

  • Page 42: Figure 17. Rotary Switch Reversing With Dynamic Braking

    Reversing with Dynamic Braking Circuits Figure 17. Rotary Switch Reversing with Dynamic Braking...

  • Page 43: Reversing With Dynamic Braking Using Relays

    Reversing with Dynamic Braking Circuits Reversing with Dynamic Braking using Relays This can be accomplished with two 3PDT relays, three momentary operated pushbutton switches (two with normally open contacts and one with normally closed contacts) and a jumper wire in place of a dynamic braking resistor.

  • Page 44: Figure 18. Reversing With Dynamic Braking Using Relays

    Reversing with Dynamic Braking Circuits Figure 18. Reversing with Dynamic Braking using Relays...

  • Page 45: Limit Switch Circuits

    Limit Switch Circuits Be sure to use some type of override device on the limit switch actuators so that motor coast does not Warning damage limit switches or allow limit switches to deactivate. Care must be taken when using dynamic braking with gearmotors connected to inertial type loads.

  • Page 46: Toggle Switch Reversing With Limit Switches

    Limit Switch Circuits Toggle Switch Reversing with Limit Switches This can be accomplished with a 3PDT, center OFF toggle switch and two normally closed limit switches. When power is applied to the control and the toggle switch is in the center position, the motor is STOPPED.

  • Page 47: Figure 19. Toggle Switch Reversing With Limit Switches

    Limit Switch Circuits Figure 19. Toggle Switch Reversing with Limit Switches...

  • Page 48: Relay Reversing With Dynamic Braking And Limit Switches

    Limit Switch Circuits Relay Reversing with Dynamic Braking and Limit Switches This can be accomplished with two 3PDT relays, three momentary operated pushbutton switches (two with normally open contacts and one with normally closed contacts), two normally closed limit switches and a 12 AWG jumper wire in place of a dynamic braking resistor.
  • Page 49 Limit Switch Circuits In operation, power is applied to the SL10U control and the appropriate voltage to L1 and L2. When PB1 is actuated, the motor will run forward until the limit switch is actuated and the motor dynamically brakes to a stop. When PB3 is actuated, the motor will run in reverse until the other limit switch is actuated and the motor dynamically brakes to a stop.

  • Page 50: Figure 20. Relay Reversing / Braking With Limit Switches

    Limit Switch Circuits Figure 20. Relay Reversing / Braking with Limit Switches...

  • Page 51: Troubleshooting

    Troubleshooting Before proceeding check the following: • Be sure the power line is the same voltage as that listed on the control nameplate. • Check to see that the line fuse is of the same value as shown on the control nameplate. I.
  • Page 52 Troubleshooting II. Set speed control pot, P1, at zero on the dial and apply power. If the line fuse blows, disconnect the power and check the following: A. Transient suppressor, DAS, may be shorted. B. One or more of the diodes (D2, D3, D4, or D5) may be shorted.
  • Page 53 Troubleshooting III. Connect the motor to the control, apply power, and advance the speed adjust knob to the maximum setting on the dial: A. If the line fuse continues to blow: 1. The motor may be overloaded. a. Disconnect the power from the control. b.
  • Page 54 Troubleshooting 4. A diode (D2, D3, D4, or D5) may be open causing the fuse to blow at no load or very light load. This may be due to high armature current. 5. Diode (D1) may be shorted. B. If the fuse does not blow, but the motor will not run: 1.

  • Page 55: Parts List

    Troubleshooting Parts List REFERENCE PART NUMBER DESCRIPTION 010-0020 0.02 MFD 500 VOLT 010-0034 0.15 MFD 100 VOLT 011-0015 50 MFD 6 VDC 011-0018 50 MFD 350 VDC 010-0032 0.1 MFD 500 VOLT 071-0012 1 AMP 600 VDC SILICON DIODE D3-D5 071-0007 3 AMP 600 VDC SILICON DIODE 075-0002...
  • Page 56 820 OHM 1/2 WATT 031-0046 27K OHM 1/2 WATT 031-0012 47 OHM 1/2 WATT 032-0020 10 OHM 5 WATT 164-0054 9 TERMINAL CONNECTOR (MALE) 072-0024 8 AMP 400 VOLT SCR 033-0002 3K OHM THEMISTOR 240-0004 MINARIK CHOKE 071-0002 1N4747 ZENER DIODE...
  • Page 57 NOTES...
  • Page 58 Notes...

  • Page 59: Unconditional Warranty

    Unconditional Warranty A. Warranty Minarik Corporation (referred to as "the Corporation") warrants that its products will be free from defects in workmanship and material for twelve (12) months or 3,000 hours, whichever comes first, from date of manufacture thereof. Within this warranty period, the Corporation will repair or replace, at its sole discretion, such products that are returned to Minarik Corporation, 901 East Thompson Avenue, Glendale, CA 91201-2011 USA.
  • Page 60 901 E Thompson Avenue Glendale, CA 91201-2011 Tel: (800) MINARIK or (800) 646-2745 Fax: (800) 394-6334 www.minarikcorp.com Document Number 250-0021, Revision 5 Printed in the U.S.A – 6/01 North America $10.00 Outside North America $11.00...

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