Baldor MN770 manual Section General Information, Introduction, Drive Definition, Modernizations

Page 4

Section 1

General Information

Introduction

Baldor Electric manufactures several different Drive types for the elevator industry.

 

These drives are DC SCR (Thyristor), AC Inverter (VVVF) and AC Vector. Each drive

 

type is best suited for a specific application in the elevator market. This manual provides

 

information for selection and application of Baldor Drives for use in the elevator industry.

Drive Definition

Baldor's definition of a ªDriveº includes both the Motor and the Control.

 

 

M ) C ￿ D

Where: M = Motor

 

 

 

C = Control

 

 

 

D = Drive

 

Because each application is different, Baldor makes it easy to customize drive

 

characteristics to match the performance requirements of your application.

 

Programmable flexibility allows Baldor controls to be customized using a standard keypad

 

interface. This easy to use keypad and 32 character display give you total control of the

 

drive. This standard interface provides a family of H series products that have a simple,

 

easy to use, common sense language. These controls have the following characteristics:

 

1.

Common Keypad

 

 

2.

Common Language

 

3.

Common Commands

 

4.

Common family of expansion boards (I/O Interface)

 

This Elevator Guide is intended to assist with the following:

 

1.

Selection of the proper drive for an elevator application.

 

2.

Provide help with the set-up of the drive during installation.

Modernizations

In the United States, most controls sold for use in elevator applications are for

 

modernizations. A modernization involves upgrading an existing elevator to meet present

codes and performance levels. In these cases, usually only a control is sold. Existing motors are used. An encoder feedback device must be added when using Vector technology. An encoder feedback device must be added if using AC Vector technology.

For existing AC elevators, older two speed motors are connected to an Inverter or Vector control. For existing DC elevators, a DC motor generator set is replaced by a DC SCR control. The existing DC motor must be modified to accept an encoder or tachometer feedback device.

MN770

General Information 1-1

Page 3 Page 5
Image 4
Page 3 Page 5
Contents Elevator Application Guide MN770Table of Contents Ii Table of Contents MN770 Section General Information IntroductionDrive Definition ModernizationsLimited Warranty Safety Notice Perform a ªMeggerº test. Failure to disconnect motor from VAC or 460 VAC maximum per control ratingUnderwriter Laboratory requirements Feature Section TechnologiesOverview Drive Performance ComparisonDC SCR Control 20H Control15H Control Inverter21H Control 17H & 18H Controls Vector22H Control Section Application Considerations Electric Drives Operating Mode Common Control FeaturesAvailable Operating Modes US Measurement System Elevator Motor Horsepower SelectionMetric Measurement System Motor Sizing Dynamic Brake Hardware Selection OCW =Section Hardware Information General ConsiderationsEncoder Retrofit Cable PreparationEncoder Cables Encoder Cable Connection Differential ConnectionsEncoder End Control End Single Ended ConnectionsBuffered Encoder Output Section Set-Up Information DC SCR ControlsField Control FeedbackFinal Installation Overload = Fault Following Error = on Torque Proving = onFinal Adjustments Armature Enable Brake Release SignalSpeed Command ContactorInitial Installation and Startup Inverter ControlsPage TURN-ON Vector Controls Balanced Car Test Full Load TestFinal Wiring Connections Series 18H Control ConsiderationsProcedure Initial Set-upRated Motor Load Slip Adjustment Value Slip Adjustment ValueFinal Set-up 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 Wiring Practices Power WiringAnalog Signal Wires Encoder CircuitsOptical Isolation Plant GroundOptical Couplers 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.
Top Page Image Contents