QZ9000 Series - Industrial Crane and Hoist Inverter
Product Introduction
- Specially designed to control asynchronous motors for crane operations, such as hoisting, travel, and rotation；
- High performance AC crane drive, open & closed loop, three phase；
- Speed control accuracy: ±0.5% (SVC), ±0.02% (FVC)；
- Overload: works stably under 110%; 150% for 60 seconds; 180% for 3 seconds；
- Built-in braking unit in all models；
- Leading flux closed-loop and open-loop low-frequency vector control algorithms；
- Reliable time sequence logic of brake control, with braking failure detection & protection；
- Light hook fast speed operation; anti-sway；professional brake timing control；
- Stroke limit control function；light load speed increase adaptive；Intelligent anti-sway function;
- QZ9000 series Variable Speed Drive offers more efficient and safe to industrial crane equiptments. The QZ9000 series variable frequency drives (VFD) provide the intelligence, performance, flexibility and safety for your crane applications. Wherever the cranes are installed, our wideworld service and support is always near.
- Series QZ9000 AC drives with built-in crane control software, brake unit and range of safety functions help various types of cranes move efficiently.
Our QZ9000 drives are an excellent choice for standalone cranes.
Technical specifications
| Item | Specification |
| Control Mode | V/F control Sensorless flux vector control (SVC) Close-loop vector control (FVC) |
| Maximum frequency | 0～150Hz |
| Carrier frequency | 1kHz～12kHz，the carrier frequency is automatically adjusted based on the load features. |
| Multiple speeds | It implements up to 8 speeds via terminal states |
| Ramp Mode | Straight-line or curve ramp. Three groups of acceleration/deceleration time with the range of 0.00`6500.0 |
| Torque boost | Auto-boost; Customized boost: 0.1%~30.0% |
| Support for kinds of PG cards | Support for PG cards of resolver, differential, open collector |
| Instantaneous stop doesn’t stop | The load feedback energy compensates the voltage reduction so that the inverter can continue to run for a short time. |
| Over-voltage/over-current stall control | The current and voltage are limited automatically during the running process so as to avoid frequent tripping due to over voltage/over current |
| Torque limit and control | It can limit the torque automatically and prevent frequent over current tripping during the running process. Torque control can be implemented in the FVC mode. |
| Communication | RS-485，CAN |
| Lifting process control | Inverter built in anti-sway, grab and other complex lifting process control, used for lifting, translation, slewing and other driving in lifting equipment. |
| Protection mode | Motor short-circuit detection at power-on, input/output phase loss protection, over current protection, over voltage protection, under voltage protection, overheat protection and overload protection |
| Rapid current limit | It helps to avoid frequent over current faults of the inverter. |
| Auto voltage regulation (AVR) | It can keep constant output voltage automatically when the mains voltage changes |
| Input terminal | Maximum 10 digital input terminals；2 analog input terminals；1 voltage input (only support for 0~10V,)，1 voltage input(0~10V) or current input (4～20mA) (Different power are with different terminals, see details at circuit description) |
| Frequency source | Digital setting, analog voltage setting, analog current setting, communication setting, serial port setting.You can perform switchover in various ways. |
| Command source | Operation panel/Control terminals/Serial communication port; You can perform switchover between these sources in various ways. |
| Output terminal | 2 digital output terminals; 2 relay output terminals |
Application：
1：Bridge crane
2：Overhead crane: High-level crane (also commonly referred to as 'bridge crane', with slight variations depending on the specific application scenario. The former focuses more on the 'high-level operation' feature)
3：Process crane: Process crane (a customized lifting equipment specifically designed for specific industrial processes, such as in the steel and chemical industries)
4：Rail-mounted gantry crane: Track-mounted portal crane (referred to as 'rail-mounted portal crane', which moves along the track and is mostly used for cargo transfer in storage yards)
5：Rubber-tired gantry crane, RTG crane: Tire-type portal crane (RTG crane, with tires as the traveling device, is more flexible than track-type and is commonly found in ports and logistics storage areas)
6：Goliath crane: Giant gantry crane (The term 'Goliath' is derived from 'Goliath', meaning 'giant'. It is a large-span, high-capacity gantry crane, commonly used in heavy industries such as shipbuilding and wind power equipment hoisting)
7：Grab crane: Grab crane (equipped with a grab device, specifically used for grasping bulk materials such as coal, ores, grains, etc.)
8：Ship to shore crane (STS crane), container crane, port crane: Shore bridge crane (STS crane), container crane, port crane: These are cranes that transfer containers from ships to the shore. They are core equipment in port terminals and their main function is to facilitate the transfer of containers between ships and the shore.
9：Marine crane: Ship crane (installed on ships, used for cargo loading and unloading, equipment lifting, etc. It needs to be corrosion-resistant and able to withstand oceanic vibrations to adapt to the marine environment)
10：Mobile crane: Mobile crane (refers to lifting equipment that can be flexibly moved, covering various types such as truck cranes and crawler cranes, with wide application scenarios)
11：Ower crane: Tower crane (shortened as 'tower crane', commonly seen in construction sites, capable of lifting materials at high altitudes and with large
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