Baldor MN770 manual Inverter Controls, Initial Installation and Startup

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Inverter Controls

AC induction motors may have their speed adjusted by using an AC Inverter (VVVF) to

 

change the voltage and frequency supplied to the motor. The motor speed will be

 

relatively proportional to the frequency supplied. An AC Inverter must be able to supply

 

the amount of current the motor requires both on a continuous and peak basis under all

 

conditions of load and speed.

 

Note: Do not assume that having the required horsepower is sufficient information to

 

size the control. You will need to know the maximum voltage and current. The

 

motor nameplate should be the source for the RMS (continuous) ratings but

 

actual measurements should be made to determine the maximum required

 

current and voltage with the elevator loaded to capacity.

Initial Installation and Startup

When installed in a panel, the Series 15H control should be located away from sources of heat and in an area where the keypad is visible and convenient to operate. Refer to Series 15H manual (MN715) for installation information, watts loss requirements, and other information regarding the selection of a mounting location. Expansion boards should be installed before applying power.

Preliminary Programming After the control has been mounted and wired, the final settings can be made.

1.Level 1 Input Block, Operating Mode.

2.Level 1 Output Block, Opto Outputs.

3.Level 1 V/Hz and Boost, starting with:

CTRL BASE FREQ

60

TORQUE BOOST

5

DYNAMIC BOOST

10

SLIP COMP ADJ

2.0

V/HZ PROFILE

3PT

V/HZ 3 PT. VOLTS

10

V/HZ 3PT. FREQ

1.6

MAX OUTPUT VOLTS

100

4.Level 2 Output Limits Block, all parameters.

OPERATING ZONE

QUIET CT

PK CURRENT LIMIT

Set to max available

5.Level 2 Motor Data Block, all parameters.

6.Level 2 Brake Adjust, all parameters.

7.Set the following Level 2, Protection Block, EXTERNAL TRIP parameter to ON.

8.Calculate the size of the dynamic brake (DB) Hardware required. Refer to MN701 for sizing and selection information. Connect the DB hardware as described in MN715.

9.Operate the elevator at inspection speed. Check for correct operation of the elevator.

10.Operate the elevator at contract speed. Adjust the ACCEL, DECEL and S-CURVE parameter values as required for the best ride.

Note: In many elevator applications, the STANDARD RUN or 15 SPEED MODE is used depending on the elevator controller as well as an external S-curve generator.

MN770

Set-Up Information 5-5

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Contents Elevator Application Guide MN770Table of Contents Ii Table of Contents MN770 Drive Definition Section General InformationIntroduction ModernizationsLimited Warranty Safety Notice Underwriter Laboratory requirements VAC or 460 VAC maximum per control ratingPerform a ªMeggerº test. Failure to disconnect motor from Overview FeatureSection Technologies Drive Performance ComparisonDC SCR Control 20H Control21H Control Inverter15H Control 22H Control Vector17H & 18H Controls Section Application Considerations Electric Drives Available Operating Modes Common Control FeaturesOperating Mode Metric Measurement System Elevator Motor Horsepower SelectionUS Measurement System Motor Sizing Dynamic Brake Hardware Selection OCW =Encoder Retrofit Section Hardware InformationGeneral Considerations Cable PreparationEncoder Cables Encoder End Control End Encoder Cable ConnectionDifferential Connections Single Ended ConnectionsBuffered Encoder Output Field Control Section Set-Up InformationDC SCR Controls FeedbackFinal Installation Overload = Fault Following Error = on Torque Proving = onFinal Adjustments Speed Command Armature EnableBrake Release Signal ContactorInitial Installation and Startup Inverter ControlsPage TURN-ON Vector Controls Balanced Car Test Full Load TestFinal Wiring Connections Series 18H Control ConsiderationsProcedure Initial Set-upFinal Set-up Slip Adjustment ValueRated Motor Load Slip Adjustment Value Power Up/Down Sequence for Vector Controls Pre-Installation Tests DateVector Control Worksheet Set-Up Information MN770 Section Troubleshooting Electrical Noise Display R-C Snubber Circuit & twisted-pair Electrical Noise Considerations10HP, 460VAC Drive 30HP, 500VDC Drive, Shielded 10 Isolated Mounting Method Analog Signal Wires Wiring PracticesPower Wiring Encoder CircuitsOptical Couplers Optical IsolationPlant Ground Fiber OpticsAppendix a Load Weighing / Torque Feed ForwardTable A-1 Description of OperationAppendix B Serial CommunicationsAppendix B MN770 Appendix C Elevator Industry GlossaryPage Page Appendix C MN770 Box  Baldor Electric Company MN770 97 C&J300

MN770 specifications

The Baldor MN770 is an impressive industrial motor designed for a variety of applications, showcasing robust construction and advanced technology. Known for its reliability and efficiency, the MN770 is manufactured by Baldor Electric Company, a prominent name in the electric motor industry.

One of the main features of the MN770 is its high-efficiency design. This motor adheres to stringent efficiency standards, helping to reduce energy consumption and lower operational costs. It typically meets or exceeds NEMA Premium Efficiency ratings, making it an excellent choice for businesses looking to optimize their energy use.

The MN770 motor is built with a durable cast iron frame, ensuring longevity and resistance to harsh operating conditions. Its weatherproof design is ideal for both indoor and outdoor applications, making it suitable for various environments, including manufacturing plants, water treatment facilities, and agricultural operations.

Another significant characteristic of the MN770 is its versatility. The motor is available in a range of horsepower ratings, allowing users to select the model that best fits their specific needs. Additionally, it offers various mounting configurations and voltage options, further enhancing its adaptability for diverse applications.

The motor utilizes advanced insulation systems and cooling technologies to ensure optimal performance and a longer lifespan. The robust design helps to dissipate heat effectively, enabling the motor to operate efficiently even under heavy loads. This characteristic is essential for applications requiring continuous operation without compromising reliability.

Moreover, the Baldor MN770 incorporates advanced design features such as precision-balanced rotors and high-performance bearings. These characteristics contribute to reduced vibration and noise levels, promoting a quieter working environment and improving overall operation efficiency.

In summary, the Baldor MN770 motor stands out due to its high efficiency, robust construction, versatility, and advanced technologies. Its ability to perform reliably in various industrial applications makes it a popular choice among engineers and facility managers. Investing in the MN770 not only enhances operational efficiency but also supports sustainability efforts by reducing energy consumption in industrial environments.
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