Rectifiers

Types of Electric Rectifiers Offered by Bruce Electric

 

At Bruce Electric, we take pride in our collection of new and used elevator and crane rectifiers for sale.

 

1. Crane Rectifiers: – Crane rectifiers are electrical devices used to convert alternating current (AC) to direct current (DC) specifically for crane applications, providing the necessary power for motors and control circuits in cranes. We provide the following types of Crane rectifiers:

 

• Constant Potential Diode Non-Regulated Rectifiers: Our collection features non-regulated rectifiers such as constant voltage regulators (CVR) and manually variable regulators (MVR) designed to operate in the 1 to 2000 kw capacity range. These rectifiers feature a power diode rectifier bridge that can maintain 10% of input voltage fluctuation or output voltage fluctuations with 6% a+. The CVR models are ideal for heavy-duty crane applications requiring above 20 Kw capacity, whereas MVR models are ideal for applications requiring 1 -20 Kw capacity.
• SCR Regulated Out Rectifiers: These silicon-controlled rectifiers (SCRs) feature a four-layer solid-state controlling device with three terminals. These unidirectional devices can conduct current in a single direction and their conduction is controlled by an external trigger. These rectifiers are used as motor control and power regulator devices.

 

2. Elevator Rectifiers: – Elevator rectifiers are components that convert AC to DC for elevator systems, ensuring stable and reliable power supply to the elevator motors and control mechanisms for smooth and safe operation. We provide the following elevator rectifier:

 

• GVR Rectifiers: These are fuseless constant potential diode rectifiers featuring regenerative absorption protection circuit. GVR rectifiers are DC grid retirement rectifiers designed to operate in 1 to 2000 kw capacity range and are designed for elevators and various loads on a utility DC distribution network.

 

Technical Specifications of Electric Power Rectifiers

 

We provide electric power rectifiers in the following specifications.

 

• Input Voltage Range: 120V – 480V AC
• Output Voltage: 12V, 24V – 48V DC
• Current Capacity: Up to 1000A
• Efficiency: Up to 95%
• Ripple Voltage: <1%
• Temperature Range: -20°C to +70°C
• Cooling Method: Air-cooled, water-cooled
• Protection Features: Overload protection, short-circuit protection

 

Benefits of Using Crane and Elevator Rectifiers

 

There are several benefits of using new, used, and reconditioned crane rectifiers offered by us.

 

• High Power Conversion Efficiency: Our rectifiers offer up to 95% efficiency, ensuring efficient power conversion of AC to DC in crane motors and elevators. This results in low operational costs and reduced energy consumption.
• Improved Motor Control: Rectified controlled DC motors ensure better torque control and speed, which helps ensure the smooth operation of cranes at workplaces.
• Stable and Reliable Operation: Rectifiers contribute to the consistent crane and elevator performance by assuring a stable power supply. This works best where cranes are extensively used for material handling tasks or elevators in DC distribution network.
• Improved Safety: Rectifiers enable excellent control over motor operations, which enables safe load handling. This smooth load handling helps reduce the risk of damages and accidents in environments where cranes are used widely.
• Reduced Electrical Noise: DC motors are generally quieter than AC motors. This means rectifier-powered DC motors produce less noise than their AC counterparts. They are beneficial for environments where high electromagnetic interference can be a concern.
• Environmental Benefits: Our elevator and crane rectifiers contribute to low greenhouse gas emissions by reducing power consumption and improving energy efficiency, thereby helping users to achieve their sustainability goals in industrial operations.
• Reduced Space Requirements and Installation Costs: Fuseless rectifiers and elevator duty regeneration circuits are included in a common enclosure package, enabling quick-set up, reduced installation costs, and space requirements in any facility using them as elevator rectifiers

 

Application of Electrical Rectifiers

 

• Power Supplies for Industrial Electronic Equipment
• Battery Charging Systems
• Telecommunication Systems
• Renewable Energy Systems
• Railway and Traction Systems

 

Tips to Choose Elevator and Crane Rectifiers

 

Rectifier assemblies enable the conversion of AC to DC power, used to drive different components in a crane. Hence, here are some considerations to make when choosing them for your crane and elevator operations:

 

• Load Capacity and Duty Cycles: Check the elevator and crane’s maximum load capacity, as this will help you decide the rectifier’s power efficiency. Also, access the elevator and crane’s operational duty cycle, as this will help analyze whether the rectifier can handle the expected usage without degradation or overheating.
• Current and Voltage Ratings: Crane and elevator components have specific current and voltage requirements. Ensure that the rectifiers you choose match the voltage and current ratings of the motors or components where they will be used.
• Conversion Efficiency: The rectifiers must possess high conversion efficiency, as this helps minimize energy loss. Consider rectifiers with regenerative braking capabilities, which would help reduce power loss during braking.
• Thermal Management: Crane and elevator rectifiers usually generate heat during operation. So, check if it has proper thermal management features, such as heat sinks or fans, necessary to prevent overheating during prolonged use.
• Redundancy and Reliability: Cranes are used for material handling operations across industries. Similarly, elevators help transport people across facilities. Thus, downtime due to the failure of a rectifier assembly can be costly. Hence, it is important to choose highly reliable rectifier assemblies. Ensure that redundancy measures are implemented to assure the uninterrupted operation of cranes and elevators in case of component failure.
• Safety and Compliance: The rectifier assemblies used in the cranes and elevators must comply with relevant safety standards, such as CE or UL. So, it is essential to ensure the rectifier is equipped with safety features, such as short circuit, overcurrent protection or thermal shutdown to protect the device and operator.
• Serviceability and Maintenance: The rectifier assembly must be designed for easy maintenance and serviceability. For instance, your rectifier must possess clear diagnostics, and easy component access. Also, the replacement parts must be easily available.
• Operational Environment Considerations: Cranes are used indoors and outdoors for material handling. Like many other material handling equipment, cranes are exposed to harsh environments, such as moisture, dust, or temperature extremes. Similarly, elevators are also exposed to high traffic and other environmental conditions. Hence, the rectifiers you choose must feature enclosures or other protective measures that help safeguard soft components from harsh environmental conditions.

 

At Bruce Electric, we offer new, reconditioned, and used crane and elevator rectifiers from different brands. Have questions about our rectifiers? Need a specific type of rectifier for your crane or elevator? Fill out the form above to share your requirements, and our team will get back to you promptly.

 

FAQ:

 

• How to maintain elevator and crane rectifiers?

Crane rectifiers require regular maintenance to ensure their lasting performance. The following tips will be helpful in this context.

 

• Check and replace any worn or damaged components
• Monitor electric connections for integrity and safety
• Ensure proper thermal efficiency is adhered to prevent overheating
• Conduct periodic testing to ensure optimal safety and performance

  

• What is the typical lifespan of a rectifier?

The typical lifespan of a rectifier can vary depending on factors like usage, operating conditions, and maintenance, but it often ranges from 5 to 20 years.

 

• Can I retrofit my crane with any of the rectifiers offered by you?

Yes, you can retrofit the crane with new rectifiers in our collection. However, this requires consideration of compatibility with existing control systems, motors, load capacities, and many more. Contact our team today to discuss your requirements and they will help you to make the right selection.